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C51: ?C?COPYXX UNRESOLVED EXTERNAL FROM EVAL VERSION
Information in this article applies to:
- C51 Version 5.20 Evaluation
SYMPTOMS
When I build my project, I get an unresolved external error for the following segment:
?C?COPYP2
What does it mean? What am I doing wrong?
CAUSE
You are attempting to use dual data pointers. However, the evaluation version of the tools does not include the data copying libraries that utilize dual data pointers. Any of the following segment names may appear for the same reason:
- ?C?COPYAMD
- ?C?COPYA2
In addition, the evaluation version of the tools does not include copy routines that utilize 517. The following segment name appears in the Unresolved external error:
- ?C?COPY517
RESOLUTION
Select C51 Compiler Options from the Options menu and click on the Chip tab. From the drop down list choose 'Standard 8051' to disable dual data pointers and the use of 517.
SEE ALSO
- C51: DUAL DATA POINTER PERFORMANCE INCREASE
- C51: DUAL DATA POINTERS FOR DALLAS PARTS
- C51: DUAL DATA POINTERS AND PHILIPS
- C51: CORRUPTION OF DPTR WHEN USING MODP2
- MON51: DOESN'T SAVE THE DUAL DATA POINTERS
FORUM THREADS
The following Discussion Forum threads may provide information related to this topic.
Last Reviewed: Thursday, June 10, 2004