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Problem: When UTF-16 is used in a request, the response includes only question marks

Description

When UTF-16 is used in a request, the response includes only two question marks ("??"). In addition, no error messages are written to the log files.

Cause

ArcIMS supports only UTF-8 encoding.

Solution or Workaround

Check that the requests use UTF-8 in the prolog, which is the first line of an ArcXML request.

<?xml version="1.0" encoding="UTF-8"?>
<ARCXML version="1.1">
...
</ARCXML>