Problem:

This oocurs when trying to do a call 'cbl_alloc_mem'

The error returns - 173 module not found 'cbl_allo'

The message on the 173 error displayed a  truncated name such as  cbl_allo

Resolution:

This error was encountered in a program that had a mixture of mainframe and pc coding and a  mainframe dialect was being used.

If this occurs use the NOMAPNAME directive and this will stop the truncation of called program