Hi Mike, Mr. Ostermiller apparently did not compile his code with the "-g" flag, that's why the part of the stack trace that deals with his classes, does not contain line numbers. I presume that the source code for Mr. Ostermiller's utilities is available. If so, I suggest you recompile his utilities -- from his source code -- using the "-g" flag. Alternatively, he may have a "debug-enabled" version that he can give you. Hope this helps. Good Luck, Avi.