You cannot use the Windows Subsystem for Linux COBOL compiler

You use the deprecated COBOL compiler, and cannot use the current compiler.

Symptoms

The way Rule Designer gets COBOL compiler support on Windows has been changed. Previously, Rule Designer used the Windows COBOL compiler, which is deprecated. Now, the rule editor uses the Windows Subsystem for Linux®, which has the COBOL compiler running in it. This setup is the current default behavior upon installation of the component.

Resolving the problem

You must set the eclipse.ini file to use the old compiler. By default, the starting file uses the new compiler. To use the old compiler, change the following parameter from true to false as shown:

-cobol.use.wsl.compiler=false

Setting the parameter to false reverts Rule Designer to the previous compiler.