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Attempt to store into an expression: Structure reference [message #63286] Tue, 04 November 2008 08:21
greg.addr is currently offline  greg.addr
Messages: 160
Registered: May 2007
Senior Member
I'm doing something wrong here, but what - I'm not sure...

IDL> help,s.tab
<Expression> POINTER = <PtrHeapVar26>

IDL> help,*(s.tab)
<PtrHeapVar26> STRUCT = -> TAB Array[2]

IDL> help,(*(s.tab))[0]
<Expression> STRUCT = -> TAB Array[1]

IDL> help,((*(s.tab))[0]).img
<Expression> POINTER = <NullPointer>

IDL> ((*(s.tab))[0]).img=ptr_new(image)
% Attempt to store into an expression: Structure reference.

Any ideas why I can't assign something to this pointer?

Greg

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