When trying to test my new game I keep getting this error message after clicking the Run button:

LDF-ERROR: Unspecified: errors:found ---/E:\unf03.asl

The last part is the name of my game but what does the rest mean?

An LDF error means Quest was looking for some text but couldn't find it in the current language file. It looks like I've made a mistake in Quest as it should actually be looking for the "error:found" string, not "errors:found". The message you should see is "Errors found in E:\unf03.asl - Read logfile (if enabled) for details".

As I presume you're using Quest in English, you can turn off multiple language support, and Quest will always use its built-in strings rather than looking for them in an LDF file.

Ok, for my next question: how do I turn off multiple language support?

On the Options window, on the Display tab, about two-thirds down.

All sorted! Thanks!