The following note is issued if the SASMSTORE= system option is used to store a compiled macro if the IMPLMAC system option is also specified. This option specifies that the macro processor examine the first word of every submitted statement to see whether it is a statement-style macro invocation:

  The SAS System was unable to open the macro library referenced by the
  SASMSTORE = libref.

It is recommended that statement-style macros not be used. Having to check the first word in every statement for a statement-style macro can greatly increase processing time. The NOIMPLMAC system should always be set.

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