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Resolved How to reset a variable-length array
  1. How-to
  2.  PowerBuilder (Appeon)
0 Votes
  1. Tracy Lamb
  2. PowerBuilder
  3. Friday, 21 January 2022 02:51 PM UTC

Hi all,

This is probably a rookie question, but I can't seem to re-set a variable-length array... 

Here's what I'm doing:

for ll_ThisRow = 1 to ll_RowCount
   li_doc = 1
   ... other stuff ...
   istr_documents[li_doc] = ls_filename
   li_doc++
   // If Include Attachment checked, add doc name to array
   if cbx_attachments.checked then
      ... other stuff ...
      li_doc++
   end if
  ls_mergeFiles = '"' + istr_documents[1] + '"'
  li_docCount = UpperBound(istr_documents)
  for li_doc = 2 to li_docCount
     ls_mergeFiles = ls_mergeFiles + ' "' + istr_documents[li_doc] +'"'
  next
  ... other stuff ...

  SetNull(istr_documents[])
next

Everything works fine the first time through the loop, but the second time through I get the following error:

Error Number 46: Null object reference cannot be be assigned or passed to a variable of this type.

The offending line is in bold above.

I'm thinking I'm resetting the array wrong?

TIA, ~~~Tracy

Runtime path is inconsistent with current Runtime version Switching Executable Runtime Without Rebuild?
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