Package History:
I was asked to write the package by a User who could see the financial advantages of moving to CA-7. However, any gain would pale into insignificance if the conversion wasn't accurate or took a ridiculous amount of time to do.

Conversion Approach:
This was very simple -  a series of programs  would extract data from the OPC/ESA reports and create CA-7 batch terminal input cards (used to create a CA-7 database). While this design seemed obvious, it is different to the question/answer style of a previous package using REXX panels.

OPC Report reads:
Once the five OPC/ESA reports have been run the first programs are used to extract data from these and copy the data into simple text files. All the other programs then use these files and not the orginal OPC reports. The idea here is to simplfy the input stage of the next programs and also allow the User to alter the OPC data before the start of the conversion is required.