Symptoms of java error 1601 - Quick Error Code 1601 Runtime errors occur without warning. The error message may appear on the screen each time the Quicken software is run. In fact, the error message or other dialog box may appear again and again if not dealt with very soon. Repair methods QuickBooks java error 1601can be annoying and persistent, but it's not totally hopeless, fixes are possible. Here are ways to fix it. There are also repair methods. If a fix method works for you, please click the "upvote" button to the left of the answer. , this will let other users know which repair method is currently working best. Note: Neither ErrorVault.com nor its editors claim responsibility for the results of actions taken while employing any of the repair methods listed on this page - you perform these steps at your own risk. Method 1 - Close Conflicting Programs When you get a runtime error, keep in mind that it happens due to programs conflicting with each other. The first thing you can do to fix the problem is to stop these conflicting programs. Open Task Manager by clicking Ctrl-Alt-Delete at the same time. This will allow you to see the list of running programs. Go to the Processes tab and stop the programs one by one by highlighting each program and clicking the End Process button. You will need to observe if the error message will reoccur every time you kill a process. Once you have identified the program causing the error, you can move on to the next troubleshooting step, by reinstalling the application.