I came across this accidentally, I usually try to run code instead of executing empty files.
1. run JQT 2. File-> New Temp 3. In edit window, close temp file/others so that there are no open files. 4. Press the run icon (Green arrow). 5. J crashes Problem signature: Problem Event Name: APPCRASH Application Name: jqt.exe Application Version: 0.0.0.0 Application Timestamp: 52eac404 Fault Module Name: QtGui4.dll Fault Module Version: 4.8.5.0 Fault Module Timestamp: 52e2916f Exception Code: c0000005 Exception Offset: 00000000003f9366 OS Version: 6.1.7601.2.1.0.256.48 Locale ID: 1033 Additional Information 1: 7dbe Additional Information 2: 7dbe404552ab25eb18c85b7ac9765728 Additional Information 3: ed66 Additional Information 4: ed66bdceb79d12598c47131b606426ad Windows 7 JVERSION Engine: j701/2011-01-10/11:25 Library: 8.01.020 Qt IDE: 1.0.23/4.8.5 Platform: Win 64 Installer: j801 install InstallPath: c:/users/lettoke/j64-801 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm