SYMPTOM
Users trying to export a document or dashboard to Flash from Strategy Web find that they receive "Index Out of Range" errors in the web browser. Sometimes, they are redirected back to the Strategy Web login screen. Whenever the export fails, the following errors are seen in the DSSErrors.log on the Strategy Intelligence Server machine:
Child Process hung: Command TransformerTransformForExportCommandCDSSExporter::ExportDocument3: Export failed for document name XXXXX
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MicroStrategy\DSS Suite

UNIX/Linux
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MicroStrategy\DSS Suite
"MHTProcessTimeout"=dword:0000012C