Try again You probably already did, but make sure you can reproduce the problem. If it only occurred once, it’s not a problem. Check your code again Check your code carefully for errors, and maybe ask a colleague’s opinion. Compile Your project might contain compile errors, so compile it to be sure. Close the debugger Sometimes, when the debugger is active, AX will keep executing ‘old’ code. Close the debugger to make sure the latest code is executing. Compile forward When you have modified a class that is inherited by other classes, you might want to compile forward this class. Synchronize data dictionary You may have made changes to application objects that haven’t been synchronized with the database. Open the AOT, right click on the Data Dictionary node and choose Synchronize. Restart AX client Simple as that, close the AX client and start it again. Reset usage data Go to options screen (AX button > Extra > Options) and click the Usage Data button. Click reset to remo...