diff --git a/base/mp_init.sas b/base/mp_init.sas
index 5fbff21..09cae00 100644
--- a/base/mp_init.sas
+++ b/base/mp_init.sas
@@ -1,15 +1,25 @@
 /**
   @file
   @brief Initialise session with useful settings and variables
-  @details Implements a set of recommended options for general SAS use.  This
-    macro is NOT used elsewhere within the core library (other than in tests),
-    but it is used by the SASjs team when building web services for
-    SAS-Powered applications elsewhere.
+  @details Implements a "strict" set of SAS options for use in defensive
+    programming.  Highly recommended, if you want your code to run on some
+    other machine.
 
-    If you have a good idea for an option, setting, or useful global variable -
-    feel free to [raise an issue](https://github.com/sasjs/core/issues/new)!
+    This macro is recommended to be compiled and invoked in the `initProgram`
+    for SASjs [Jobs](https://cli.sasjs.io/sasjsconfig.html#jobConfig_initProgram
+    ), [Services](
+    https://cli.sasjs.io/sasjsconfig.html#serviceConfig_initProgram) and [Tests]
+    (https://cli.sasjs.io/sasjsconfig.html#testConfig_initProgram).
 
-    All global variables are prefixed with "SASJS_" (unless modfied with the
+    For non SASjs projects, you could invoke in the autoexec, or in your own
+    solution initialisation macro.
+
+
+    If you have a good idea for another useful option, setting, or global
+    variable - feel free to [raise an issue](
+    https://github.com/sasjs/core/issues/new)!
+
+    All global variables are prefixed with "SASJS" (unless modified with the
     prefix parameter).
 
   @param [in] prefix= (SASJS) The prefix to apply to the global macro variables
@@ -39,15 +49,16 @@
     autocorrect             /* disallow mis-spelled procedure names           */
     compress=CHAR           /* default is none so ensure we have something!   */
     datastmtchk=ALLKEYWORDS /* protection from overwriting input datasets     */
-    errorcheck=STRICT       /* catch errors in libname/filename statements    */
-    fmterr                  /* ensure err   when a format cannot be found     */
-    mergenoby=%str(ERR)OR   /* Throw err   when a merge has no BY variables   */
-    missing=.    /* some sites change this which causes hard to detect errors */
+    errorcheck=STRICT       /* catch errs in libname/filename statements      */
+    fmterr                  /* ensure err when a format cannot be found       */
+    mergenoby=%str(ERR)OR   /* throw err when a merge has no BY variables     */
+    missing=.               /* changing this can cause hard to detect errs    */
     noquotelenmax           /* avoid warnings for long strings                */
     noreplace               /* avoid overwriting permanent datasets           */
     ps=max                  /* reduce log size slightly                       */
     validmemname=COMPATIBLE /* avoid special characters etc in table names    */
     validvarname=V7         /* avoid special characters etc in variable names */
+    varinitchk=%str(ERR)OR  /* avoid data mistakes from variable name typos   */
     varlenchk=%str(ERR)OR   /* fail hard if truncation (data loss) can result */
   ;