OT COBOL, anyone? External symbol 'hcobol_cvt_str2bnum' not found

I'm not too familiar with the language or the environment. Does anyone know what could be causing this and a possible remedy? I'm not using any other libraries other than what came with the OTCOBOL distro. I ev开发者_高级运维en rebuilt OTCOBOL and recompiled. Still getting this error.

I've tried compile, make, and build from the IDE as well as from the command line.

As requested, here is a link to OTCOBOL: http://www.tim-r-norton.com/images/otcobolz.exe

I don't recognise the name OTCOBOL, but the error seems to imply a conversion from string to binary has failed. Is this a compile or run-time error?