@BatedMarlin: No, wrong set quotation marks cannot be the problem. These would obviously throw a syntax error ;)
When you take a look at the page Menu(, it says the following definition:
ERR:LABEL is thrown when an option is chosen whose label doesn't exist
But you said that the chosen Label definetely does exist.
So, for finding the mistake, we have to take up the way the calculator works with Labels into our mind.
If the calculator reaches a Jump statement, which can be caused by Goto and by Menu(, he searches the whole code for the chosen label that you want to jump to. It starts searching at the beginning and goes to the end and if the Label is in the last line, the calculator searches through the whole code.
I may be wrong, but due to the fact that your program is 10 k bytes large, the calculator may not be able to find the Label.
Maybe I am wrong.
Please make also sure that your Label is in the same program and not in one of its subprograns ;) But normally it should always work and not throw an error… :/