Is R01 the SP4 rollup update? If so yes. Matthew Shrewsbury, MCSE+Internet MCSE 2000 CCA Server+ Senior Network Administrator -----Original Message----- From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Carl Stalhood Sent: Thursday, November 10, 2005 9:01 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] Re: wfshell.exe - Application Error Maybe a printer problem? Some client printers might cause this to occur during auto-creation. Are you running R01 for SP4? ________________________________ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Matthew Shrewsbury Sent: Thursday, November 10, 2005 7:44 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] wfshell.exe - Application Error I just started getting this on both load balanced server (XPA, FR3, SP4, on Windows 2000 SP4). Application popup: wfshell.exe - Application Error : The instruction at "0x77fcb6a3" referenced memory at "0x0063006b". The memory could not be "read". Anyone had this before? I noticed that RDP sessions don't seem to receive this error. Matthew Shrewsbury, MCSE+Internet MCSE 2000 CCA Server+ Senior Network Administrator