DoCmd.OutputTo acReport, "xxxxxx", acFormatXLS, RutaArchivoGuardado, False don't work properly after the last Update.
How to Fix:
Unnistall:
Security Update for Microsoft Office 2013(KB3178643) 32-Bit Edition
Security Update for Microsoft Office 2013(KB3172522) 32-Bit Edition
Security Update for Microsoft Office 2013(KB3172522) 32-Bit Edition
