There was a QEWSD= entry in the .odbc.ini file which I removed. When they reran the job the QEWSD= entry had reappeared and the job failed. Jobs that do not run stored procedures run successfully. Developer has verified the Oracle Id can run the stored procedure in SQLPlus.
From the Data Direct Forum I discovered the 6060 code is a licensing error. The IVODBC.LIC file had not been installed on the system that was failing. Copied the file from one of the working systems. All is working ok now.