I am facing an error while compiling (using Build and Debug option) OPA rule base in OPM 10.4.4 version.
The rule base was originally built in 10.4.2 and it gets successfully complied in 10.4.2 version.
Error code: OPA - E00088 ( Unknown attribute)
Could you please help me with this.
Let me know if you need additional details.
Where are you seeing "Error code: OPA - E00088 ( Unknown attribute)"? Is it the 'Error List' in OPM? Often the errors there are clickable and will take you to what's causing the error, e.g. when there's an interview screen causing an error, clicking the error in the Error List usually opens the problem interview screen (in your case it sounds like an attribute not a screen though).
The other thing I'd try is narrowing down the cause of the problem. For example, is there a particular rule document which won't compile?