FIX: Invalid or unknown format for print spool file when printing from the Zetafax API Print ZTN1736 ID: ZTN1736 This Zetafax technical note applies to: Zetafax v2007 and later Symptom When using the Zetafax API printer functions, the Zetafax Client displays a message saying ‘Invalid or unknown format for print spool file ZETAFAX.SPL’ Cause The problem is caused by the way in which some applications remember their print settings, which could cause an unsupported printing resolution to be used. Resolution A hotfix is available. Please contact Equisys technical support for details. Last updated: 14th May 2009 (NT/MW) Keywords: < API> < printing> < spool file>