Error messages in the style TYPE1 : TYPE2 mean a syntax error. Usually two variable types were confused. The engine warns you with an error message.
The message does not tell much, but you see in which line it happens, so it should be not too hard to fix the bug when you check all variables that you use in that line. GETPVALUE : FIXED means that you've probably confused a pointer (PVALUE) with a var (FIXED). Hope this helps.