diff --git a/base/mf_getfilesize.sas b/base/mf_getfilesize.sas
index 0d4b433..551f9a2 100644
--- a/base/mf_getfilesize.sas
+++ b/base/mf_getfilesize.sas
@@ -5,18 +5,19 @@
 
       %put %mf_getfilesize(fpath=C:\temp\myfile.txt);
 
-      or
+  or, provide a libds value as follows:
 
       data x;do x=1 to 100000;y=x;output;end;run;
       %put %mf_getfilesize(libds=work.x,format=yes);
 
-      gives:
+  Which gives:
 
-      2mb
+  > 2mb
+
+  @param [in] fpath= Full path and filename.  Provide this OR the libds value.
+  @param [in] libds= (0) Library.dataset value (assumes library is BASE engine)
+  @param [in] format= (NO) Set to yes to apply sizekmg. format
 
-  @param fpath= full path and filename.  Provide this OR the libds value.
-  @param libds= library.dataset value (assumes library is BASE engine)
-  @param format=  set to yes to apply sizekmg. format
   @returns bytes
 
   @version 9.2
@@ -26,16 +27,32 @@
 %macro mf_getfilesize(fpath=,libds=0,format=NO
 )/*/STORE SOURCE*/;
 
-  %if &libds ne 0 %then %do;
-    %let fpath=%sysfunc(pathname(%scan(&libds,1,.)))/%scan(&libds,2,.).sas7bdat;
-  %end;
+  %local rc fid fref bytes dsid lib vnum;
 
-  %local rc fid fref bytes;
-  %let rc=%sysfunc(filename(fref,&fpath));
-  %let fid=%sysfunc(fopen(&fref));
-  %let bytes=%sysfunc(finfo(&fid,File Size (bytes)));
-  %let rc=%sysfunc(fclose(&fid));
-  %let rc=%sysfunc(filename(fref));
+  %if &libds ne 0 %then %do;
+    %let libds=%upcase(&libds);
+    %if %index(&libds,.)=0 %then %let lib=WORK;
+    %else %let lib=%scan(&libds,1,.);
+    %let dsid=%sysfunc(open(
+      sashelp.vtable(where=(libname="&lib" and memname="%scan(&libds,-1,.)")
+        keep=libname memname filesize
+      )
+    ));
+    %if (&dsid ^= 0) %then %do;
+      %let vnum=%sysfunc(varnum(&dsid,FILESIZE));
+      %let rc=%sysfunc(fetch(&dsid));
+      %let bytes=%sysfunc(getvarn(&dsid,&vnum));
+      %let rc= %sysfunc(close(&dsid));
+    %end;
+    %else %put &sysmacroname: &libds could not be opened! %sysfunc(sysmsg());
+  %end;
+  %else %do;
+    %let rc=%sysfunc(filename(fref,&fpath));
+    %let fid=%sysfunc(fopen(&fref));
+    %let bytes=%sysfunc(finfo(&fid,File Size (bytes)));
+    %let rc=%sysfunc(fclose(&fid));
+    %let rc=%sysfunc(filename(fref));
+  %end;
 
   %if &format=NO %then %do;
     &bytes
diff --git a/base/mp_assertdsobs.sas b/base/mp_assertdsobs.sas
index 6682da9..4abe423 100644
--- a/base/mp_assertdsobs.sas
+++ b/base/mp_assertdsobs.sas
@@ -12,10 +12,6 @@
 
       %mp_assertdsobs(sashelp.class,test=ATMOST 20) %* pass if <21 obs present;
 
-  <h4> SAS Macros </h4>
-  @li mf_nobs.sas
-  @li mp_abort.sas
-
 
   @param [in] inds input dataset to test for presence of observations
   @param [in] desc= (Testing observations) The user provided test description
@@ -33,6 +29,11 @@
   |---|---|---|
   |User Provided description|PASS|Dataset &inds has XX obs|
 
+  <h4> SAS Macros </h4>
+  @li mf_getuniquename.sas
+  @li mf_nobs.sas
+  @li mp_abort.sas
+
   <h4> Related Macros </h4>
   @li mp_assertcolvals.sas
   @li mp_assert.sas
@@ -49,9 +50,10 @@
   outds=work.test_results
 )/*/STORE SOURCE*/;
 
-  %local nobs;
+  %local nobs ds;
   %let nobs=%mf_nobs(&inds);
   %let test=%upcase(&test);
+  %let ds=%mf_getuniquename(prefix=mp_assertdsobs);
 
   %if %substr(&test.xxxxx,1,6)=EQUALS %then %do;
     %let val=%scan(&test,2,%str( ));
@@ -84,7 +86,7 @@
     )
   %end;
 
-  data;
+  data &ds;
     length test_description $256 test_result $4 test_comments $256;
     test_description=symget('desc');
     test_result='FAIL';
@@ -110,9 +112,6 @@
   %end;
   run;
 
-  %local ds;
-  %let ds=&syslast;
-
   proc append base=&outds data=&ds;
   run;
 
diff --git a/base/mp_ds2squeeze.sas b/base/mp_ds2squeeze.sas
index a9c1e16..21e3957 100644
--- a/base/mp_ds2squeeze.sas
+++ b/base/mp_ds2squeeze.sas
@@ -49,7 +49,7 @@
 
 %macro mp_ds2squeeze(
   libds,
-  outds=work.work.mp_ds2squeeze,
+  outds=work.mp_ds2squeeze,
   mdebug=0
 )/*/STORE SOURCE*/;
 %local dbg source;
@@ -62,9 +62,10 @@
   %let source=/source2;
 %end;
 
-%local optval ds fref;
+%local optval ds fref startsize;
 %let ds=%mf_getuniquename();
 %let fref=%mf_getuniquefileref();
+%let startsize=%mf_getfilesize(libds=&libds,format=yes);
 
 %mp_getmaxvarlengths(&libds,outds=&ds)
 
@@ -113,7 +114,7 @@ options varlenchk=&optval;
   filename &fref clear;
 %end;
 
-%put &sysmacroname: &libds was %mf_getfilesize(libds=&libds,format=yes);
+%put &sysmacroname: &libds was &startsize;
 %put &sysmacroname: &outds is %mf_getfilesize(libds=&outds,format=yes);
 
 %mend mp_ds2squeeze;
\ No newline at end of file
diff --git a/base/mp_init.sas b/base/mp_init.sas
index 734f555..1e191ac 100644
--- a/base/mp_init.sas
+++ b/base/mp_init.sas
@@ -37,6 +37,7 @@
 
 %global
   SASJS_PREFIX       /* the ONLY hard-coded global macro variable in SASjs    */
+  &prefix._FUNCTIONS /* used in mcf_init() to track core function compilation */
   &prefix._INIT_NUM  /* initialisation time as numeric                        */
   &prefix._INIT_DTTM /* initialisation time in E8601DT26.6 format             */
   &prefix.WORK       /* avoid typing %sysfunc(pathname(work)) every time      */
diff --git a/base/mp_stackdiffs.sas b/base/mp_stackdiffs.sas
index d35052b..5cf5489 100644
--- a/base/mp_stackdiffs.sas
+++ b/base/mp_stackdiffs.sas
@@ -194,6 +194,7 @@
   @li mf_nobs.sas
   @li mf_wordsinstr1butnotstr2.sas
   @li mp_abort.sas
+  @li mp_ds2squeeze.sas
 
 
   <h4> Related Macros </h4>
@@ -298,11 +299,14 @@ proc transpose data=&ds1d(where=(tgtvar_type='C'))
   id TGTVAR_NM;
   var OLDVAL_CHAR;
 run;
+%mp_ds2squeeze(&ds2d,outds=&ds2d)
+%mp_ds2squeeze(&ds3d,outds=&ds3d)
 data &outdel;
   if 0 then set &baselibds;
   set &ds2d;
   set &ds3d;
   drop key_hash;
+  if not missing(%scan(&key,1));
 run;
 proc sort;
   by &key;
@@ -328,11 +332,14 @@ proc transpose data=&ds1a(where=(tgtvar_type='C'))
   id TGTVAR_NM;
   var NEWVAL_CHAR;
 run;
+%mp_ds2squeeze(&ds2a,outds=&ds2a)
+%mp_ds2squeeze(&ds3a,outds=&ds3a)
 data &outadd;
   if 0 then set &baselibds;
   set &ds2a;
   set &ds3a;
   drop key_hash;
+  if not missing(%scan(&key,1));
 run;
 proc sort;
   by &key;
@@ -359,10 +366,13 @@ proc transpose data=&ds1m(where=(tgtvar_type='C'))
   id TGTVAR_NM;
   var NEWVAL_CHAR;
 run;
+%mp_ds2squeeze(&ds2m,outds=&ds2m)
+%mp_ds2squeeze(&ds3m,outds=&ds3m)
 data &outmod;
   if 0 then set &baselibds;
   set &ds2m;
   set &ds3m;
+  if not missing(%scan(&key,1));
 run;
 proc sort;
   by &key;
@@ -375,6 +385,7 @@ run;
   * passthrough and a temporary table.
   */
 data &pks;
+  if 0 then set &baselibds;
   set &outadd &outmod &outdel;
   keep &key;
 run;
@@ -382,6 +393,10 @@ run;
 proc sort noduprec dupout=&dups;
 by &key;
 run;
+data _null_;
+  set &dups;
+  putlog (_all_)(=);
+run;
 %mp_abort(iftrue= (%mf_nobs(&dups) ne 0)
   ,mac=&sysmacroname
   ,msg=%str(duplicates (%mf_nobs(&dups)) found on &auditlibds!)
@@ -542,17 +557,16 @@ select distinct tgtvar_nm into: missvars separated by ' '
   %let fref=%mf_getuniquefileref();
   data _null_;
     file &fref;
-    set &auditlibds(where=(move_type='D')) end=lastobs;
+    set &auditlibds(where=(move_type='M')) end=lastobs;
     by key_hash;
     if _n_=1 then put 'proc sql;';
     if first.key_hash then put "update &outmod set ";
     comma=ifc(first.key_hash=0,',',' ');
     if tgtvar_type='C' then put '  ' comma TGTVAR_NM '=trim("' NEWVAL_CHAR '")';
     if last.key_hash then put '  where key_hash=trim("' key_hash '");';
-    if lastobs then put 'alter &outmod drop key_hash';
+    if lastobs then put "alter table &outmod drop key_hash;";
   run;
   %inc &fref/source2;
-
 %end;
 
 %if &mdebug=0 %then %do;
diff --git a/fcmp/mcf_init.sas b/fcmp/mcf_init.sas
new file mode 100644
index 0000000..84b5735
--- /dev/null
+++ b/fcmp/mcf_init.sas
@@ -0,0 +1,44 @@
+/**
+  @file
+  @brief Sets up the mcf_xx functions
+  @details
+  There is no (efficient) way to determine if an mcf_xx macro has already been
+  invoked.  So, we make use of a global macro variable list to keep track.
+
+  Usage:
+
+      %mcf_init(MCF_LENGTH)
+
+  Returns:
+
+  > 1 (if already initialised) else 0
+
+  @param [in] func The function to be initialised
+
+  <h4> Related Macros </h4>
+  @li mcf_init.test.sas
+
+**/
+
+%macro mcf_init(func
+)/*/STORE SOURCE*/;
+
+%if not (%symexist(SASJS_PREFIX)) %then %do;
+  %global SASJS_PREFIX;
+  %let SASJS_PREFIX=SASJS;
+%end;
+
+%let func=%upcase(&func);
+
+/* the / character is just a seperator */
+%global &sasjs_prefix._FUNCTIONS;
+%if %index(&&&sasjs_prefix._FUNCTIONS,&func/)>0 %then %do;
+  1
+  %return;
+%end;
+%else %do;
+  %let &sasjs_prefix._FUNCTIONS=&&&sasjs_prefix._FUNCTIONS &func/;
+  0
+%end;
+
+%mend mcf_init;
diff --git a/fcmp/mcf_length.sas b/fcmp/mcf_length.sas
index 43b2bdb..3e8a6cf 100644
--- a/fcmp/mcf_length.sas
+++ b/fcmp/mcf_length.sas
@@ -40,10 +40,11 @@
     Uses a 3 part format:  libref.catalog.package
 
   <h4> SAS Macros </h4>
-  @li mf_existfunction.sas
+  @li mcf_init.sas
 
-  <h4> Related Macros </h4>
+  <h4> Related Programs </h4>
   @li mcf_length.test.sas
+  @li mp_init.sas
 
 **/
 
@@ -54,7 +55,7 @@
   ,pkg=UTILS
 )/*/STORE SOURCE*/;
 
-%if %mf_existfunction(mcf_length)=1 %then %return;
+%if %mcf_init(mcf_length)=1 %then %return;
 
 %if &wrap=YES  %then %do;
   proc fcmp outlib=&lib..&cat..&pkg;
diff --git a/fcmp/mcf_stpsrv_header.sas b/fcmp/mcf_stpsrv_header.sas
index e6ba2f0..b9f39f1 100644
--- a/fcmp/mcf_stpsrv_header.sas
+++ b/fcmp/mcf_stpsrv_header.sas
@@ -55,7 +55,11 @@
     Uses a 3 part format:  libref.catalog.package
 
   <h4> SAS Macros </h4>
-  @li mf_existfunction.sas
+  @li mcf_init.sas
+
+  <h4> Related Programs </h4>
+  @li mcf_stpsrv_header.test.sas
+  @li mp_init.sas
 
 **/
 
@@ -66,7 +70,7 @@
   ,pkg=UTILS
 )/*/STORE SOURCE*/;
 
-%if %mf_existfunction(stpsrv_header)=1 %then %return;
+%if %mcf_init(stpsrv_header)=1 %then %return;
 
 %if &wrap=YES  %then %do;
   proc fcmp outlib=&lib..&cat..&pkg;
diff --git a/fcmp/mcf_string2file.sas b/fcmp/mcf_string2file.sas
index f41b30c..dce768f 100644
--- a/fcmp/mcf_string2file.sas
+++ b/fcmp/mcf_string2file.sas
@@ -40,7 +40,11 @@
     Uses a 3 part format:  libref.catalog.package
 
   <h4> SAS Macros </h4>
-  @li mf_existfunction.sas
+  @li mcf_init.sas
+
+  <h4> Related Programs </h4>
+  @li mcf_stpsrv_header.test.sas
+  @li mp_init.sas
 
 **/
 
@@ -51,7 +55,7 @@
   ,pkg=UTILS
 )/*/STORE SOURCE*/;
 
-%if %mf_existfunction(mcf_string2file)=1 %then %return;
+%if %mcf_init(mcf_string2file)=1 %then %return;
 
 %if &wrap=YES  %then %do;
   proc fcmp outlib=&lib..&cat..&pkg;
diff --git a/sasjs/sasjsconfig.json b/sasjs/sasjsconfig.json
index 9840f6d..ad14bbd 100644
--- a/sasjs/sasjsconfig.json
+++ b/sasjs/sasjsconfig.json
@@ -68,7 +68,7 @@
     },
     {
       "name": "server",
-      "serverUrl": "https://sas.analytium.co.uk:5001",
+      "serverUrl": "https://sas.analytium.co.uk:5000",
       "serverType": "SASJS",
       "appLoc": "/Shared Data/temp/macrocore",
       "macroFolders": [
diff --git a/tests/crossplatform/mcf_init.test.sas b/tests/crossplatform/mcf_init.test.sas
new file mode 100644
index 0000000..e01ef56
--- /dev/null
+++ b/tests/crossplatform/mcf_init.test.sas
@@ -0,0 +1,46 @@
+/**
+  @file
+  @brief Testing mcf_init.sas macro
+
+  <h4> SAS Macros </h4>
+  @li mcf_init.sas
+  @li mp_assert.sas
+
+**/
+
+%mp_assert(
+  iftrue=(%mcf_init(test)=0),
+  desc=Check if new func returns 0
+)
+%mp_assert(
+  iftrue=(&syscc=0),
+  desc=No errs on basic invocation
+)
+%mp_assert(
+  iftrue=(%mcf_init(test)=1),
+  desc=Check if second invocation returns 1
+)
+%mp_assert(
+  iftrue=(&syscc=0),
+  desc=No errs on second invocation
+)
+%mp_assert(
+  iftrue=(%mcf_init(test2)=0),
+  desc=Check if new invocation returns 0
+)
+%mp_assert(
+  iftrue=(%mcf_init(test2)=1),
+  desc=Check if second new invocation returns 1
+)
+%mp_assert(
+  iftrue=(%mcf_init(test)=1),
+  desc=Check original returns 1
+)
+%mp_assert(
+  iftrue=(%mcf_init(t)=0),
+  desc=Check subset returns 0
+)
+%mp_assert(
+  iftrue=(&syscc=0),
+  desc=No errs at end
+)
\ No newline at end of file
diff --git a/tests/crossplatform/mf_getfilesize.test.sas b/tests/crossplatform/mf_getfilesize.test.sas
new file mode 100644
index 0000000..8554daf
--- /dev/null
+++ b/tests/crossplatform/mf_getfilesize.test.sas
@@ -0,0 +1,31 @@
+/**
+  @file
+  @brief Testing mf_getfilesize macro
+
+  <h4> SAS Macros </h4>
+  @li mf_getfilesize.sas
+  @li mp_assert.sas
+  @li mp_assertscope.sas
+
+**/
+
+data test;
+  x=1;
+run;
+
+%mp_assertscope(SNAPSHOT)
+%put %mf_getfilesize(libds=work.test)
+%mp_assertscope(COMPARE)
+
+%mp_assert(
+  iftrue=(&syscc=0),
+  desc=Checking syscc,
+  outds=work.test_results
+)
+
+%put %mf_getfilesize(libds=test)
+%mp_assert(
+  iftrue=(&syscc=0),
+  desc=Checking syscc with one level name,
+  outds=work.test_results
+)
\ No newline at end of file
diff --git a/tests/crossplatform/mp_stackdiffs.test.sas b/tests/crossplatform/mp_stackdiffs.test.sas
index 8be96a8..83f02da 100644
--- a/tests/crossplatform/mp_stackdiffs.test.sas
+++ b/tests/crossplatform/mp_stackdiffs.test.sas
@@ -32,7 +32,9 @@ data work.orig work.deleted work.changed work.appended;
   else stop;
 run;
 
-%mp_storediffs(sashelp.electric,work.orig,CUSTOMER YEAR
+%mp_storediffs(sashelp.electric
+  ,work.orig
+  ,CUSTOMER YEAR
   ,delds=work.deleted
   ,modds=work.changed
   ,appds=work.appended
diff --git a/tests/testinit.sas b/tests/testinit.sas
index a877f16..d96ccee 100644
--- a/tests/testinit.sas
+++ b/tests/testinit.sas
@@ -14,6 +14,8 @@
 /* set defaults */
 %mp_init()
 
+%global _debug;
+
 %macro loglevel();
   %if "&_debug"="2477" or "&_debug"="fields,log,trace" %then %do;
     %put debug mode activated;