An extension-load error might occur when you attempt to start a 32-bit child SAS session from a 64-bit SAS session that runs in the Microsoft Windows operating environment by using an X statement or other system-command interface. The following example illustrates the use of an X statement:

When you submit this statement from a 64-bit edition of SAS on the same machine, the following messages might occur:

Critical error loading host supervisor. 
   NLS: Extension Load Error 
       [OK]

The problem occurs because the SAS TKPATH environment variable is set to search the current 64-bit environment paths. As a result, the 32-bit edition of SAS cannot find its host extensions.

To work around the problem, reset the TKPATH environment variable before you submit the X statement,a shown in this example:

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