[great-users] Exception: Object handle is null
gabtromb at isis.vanderbilt.edu
Mon May 31 00:42:46 CDT 2004
Starting from a transformation which worked, I made some modifications.
I modified the destination metamodel, upgraded the library in GReAT,
changed the Root Element for the destination metamodel and modified some
rules. I can't see any error in my transformation, but I get an
exception on a rule which I didn't actually modify:
text: "Exception: Object handle is null"
The rule is simple:
get a child from the element from the source metamodel,
create a corresponding child from the element from the destination
link the two with a cross-diagram association (also CreateNew)
put in output the same elements which I got from the input
If I remove the create-new-crosslink-association from the diagram, the
exception disappears and all the transformation runs to the end.
Unfortunately I need that cross link...
To my knowledge, the two elements which are to be linked with the
crosslink DO exist, and there are no NULL references in the GReAT
The GReAT debugger says it's a UDM exception.
Anybody has an idea?
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