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  2. MI400
  3. May 2002

Re: CVTCH run problem

From: <Gene_Gaunt@ReviewWorks.com>
> At least the MCH1201 "scalar data cannot be changed" describes your problem
> when the source is MI.   Unfortunately the C function 'cvthc' throws a red
> herring MCH3601 "pointer not set for location referenced" when the source
> operand is not good hex.  For example:
>
>       /free
>        CVTCH( %addr( Target ) : %addr( Source ) : 6 );
>        *INLR = *on;
>       /end-free
>
> Instead of some SENSIBLE message like "invalid hex character", this code
> fails with MCH3601 "pointer not set for location referenced" .
>

confusion reigns supreme. Gene means 'cvtch', and "good hex" means
"good character representation" (in CVT-speak 'hex' is binary and is always
good, and 'character' means 'hexadecimal representation').
But IMHO, both error messages are bad. It should have been:
"invalid hexadecimal representation".

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