How to debug Pure MDL?

Hi MicroStation Programmers,

I am supporting a Pure MDL application (compiled with mcomp, etc) in V8i. How can I debug it? What tool can I use?

I tried to find a way to debug in the SDK programmer's guide, but didn't find too much beside the instruction of adding the "DEBUG" keyword in "MDL LOAD" key-in command.

Is there other tool or instruction that can help me?

Thank you!