Using Net Express and getting a 77 Internal ISAM error when reading an ISAM file

Problem:

Application is getting a "77 Internal ISAM module error" when trying to read a mainframe file from a Net Express program.

Resolution:

The problem is that the ISAM file was brought down directly from the mainframe without conversion and tried to read it with a mainframe program which was recompiled under Net Express.

It is necessary to first convert the file to a sequential file in ASCII format on the mainframe and then use the Data File converter to create a Micro focus readable file format.