Cause . . . . . : The system has generated identical signatures for two dissimilar export blocks. This error occurred while compiling line &4 of binder language source &3 in file &1 in library &2 while attempting to create service program &5 in library &6. Recovery . . . : At least one of the signatures must be changed. Make one of the following changes and then try the Create Service Program (CRTSRVPGM) or Update Service Program (UPDSRVPGM) command again: Add or remove a symbol from one of the export blocks. The added symbol may be a duplicate of one already exported from the export block, if desired. Change the name of one or more of the symbols exported from the export block. Technical description . . . . . . . . : The service program is not created.