If the PDATA = option is specified in the PARMS statement in PROC NLIN, and parameters are assigned using an ARRAY statement, then any of the following error messages might be generated:

ERROR: The variable xxx was referenced but not given a value.

ERROR: An exception has been encountered.
Please contact technical support and provide them with the following traceback information:

The SAS task name is [NLIN] ERROR:
Read Access Violation
NLIN Exception occurred at (242CDE69) 

ERROR: A bug in SAS has been encountered. Please call your SAS representative and report the following message:
cmpder:symbol_setup: wrong kind for wrt var -1

ERROR: cmpfdep() 'mindex' passed not set.

To circumvent the problem, avoid using an ARRAY statement to assign parameters, or use parameter-specification instead of the PDATA= option to assign starting values.