diff --git a/api/.env.example b/api/.env.example
index ab6de3e..a21c209 100644
--- a/api/.env.example
+++ b/api/.env.example
@@ -6,6 +6,8 @@ PROTOCOL=[http|https] default considered as http
 PRIVATE_KEY=privkey.pem
 FULL_CHAIN=fullchain.pem
 
+RUN_TIMES=[sas|js|sas,js|js,sas] default considered as sas
+
 PORT=[5000] default value is 5000
 
 HELMET_CSP_CONFIG_PATH=./csp.config.json if omitted HELMET default will be used
diff --git a/api/src/controllers/internal/FileUploadController.ts b/api/src/controllers/internal/FileUploadController.ts
index d267d43..7c6737c 100644
--- a/api/src/controllers/internal/FileUploadController.ts
+++ b/api/src/controllers/internal/FileUploadController.ts
@@ -32,7 +32,17 @@ export class FileUploadController {
 
     const programPath = (query?._program ?? body?._program) as string
 
-    const { runTime } = await getRunTimeAndFilePath(programPath)
+    let runTime
+
+    try {
+      ;({ runTime } = await getRunTimeAndFilePath(programPath))
+    } catch (err: any) {
+      res.status(400).send({
+        status: 'failure',
+        message: 'Job execution failed',
+        error: typeof err === 'object' ? err.toString() : err
+      })
+    }
 
     const sessionController =
       runTime === RunTimeType.SAS
diff --git a/api/src/controllers/stp.ts b/api/src/controllers/stp.ts
index 624762c..37e3dad 100644
--- a/api/src/controllers/stp.ts
+++ b/api/src/controllers/stp.ts
@@ -131,9 +131,9 @@ const executeReturnRaw = async (
 ): Promise<string | Buffer> => {
   const query = req.query as ExecutionVars
 
-  const { codePath, runTime } = await getRunTimeAndFilePath(_program)
-
   try {
+    const { codePath, runTime } = await getRunTimeAndFilePath(_program)
+
     const { result, httpHeaders } =
       (await new ExecutionController().executeFile({
         programPath: codePath,
@@ -169,13 +169,13 @@ const executeReturnJson = async (
   req: express.Request,
   _program: string
 ): Promise<ExecuteReturnJsonResponse> => {
-  const { codePath, runTime } = await getRunTimeAndFilePath(_program)
-
   const filesNamesMap = req.files?.length
     ? makeFilesNamesMap(req.files as MulterFile[])
     : null
 
   try {
+    const { codePath, runTime } = await getRunTimeAndFilePath(_program)
+
     const { webout, log, httpHeaders } =
       (await new ExecutionController().executeFile({
         programPath: codePath,
diff --git a/api/src/utils/getRunTimeAndFilePath.ts b/api/src/utils/getRunTimeAndFilePath.ts
index f25edf6..e36c931 100644
--- a/api/src/utils/getRunTimeAndFilePath.ts
+++ b/api/src/utils/getRunTimeAndFilePath.ts
@@ -1,18 +1,37 @@
 import path from 'path'
 import { fileExists } from '@sasjs/utils'
 import { getFilesFolder } from './file'
+import { RunTimeType } from '.'
 
 export const getRunTimeAndFilePath = async (programPath: string) => {
-  for (const runTime of process.runTimes) {
-    const codePath =
-      path
-        .join(getFilesFolder(), programPath)
-        .replace(new RegExp('/', 'g'), path.sep) +
-      '.' +
-      runTime
+  const ext = path.extname(programPath)
+  // if program path is provided with extension we should split that into code path and ext as run time
+  if (ext) {
+    const runTime = ext.slice(1)
+    const runTimeTypes = Object.values(RunTimeType)
 
-    if (await fileExists(codePath)) return { codePath, runTime }
+    if (!runTimeTypes.includes(runTime as RunTimeType)) {
+      throw `The '${runTime}' runtime is not supported.`
+    }
+
+    const codePath = path
+      .join(getFilesFolder(), programPath)
+      .replace(new RegExp('/', 'g'), path.sep)
+
+    if (await fileExists(codePath)) {
+      return { codePath, runTime: runTime as RunTimeType }
+    }
+  } else {
+    for (const runTime of process.runTimes) {
+      const codePath =
+        path
+          .join(getFilesFolder(), programPath)
+          .replace(new RegExp('/', 'g'), path.sep) +
+        '.' +
+        runTime
+
+      if (await fileExists(codePath)) return { codePath, runTime }
+    }
   }
-
   throw `The Program at (${programPath}) does not exist.`
 }