JLink Problem, Fixed More or Less
- To: mathgroup at smc.vnet.net
- Subject: [mg87436] JLink Problem, Fixed More or Less
- From: Helen Read <hpr at together.net>
- Date: Thu, 10 Apr 2008 02:15:30 -0400 (EDT)
Several months ago I reported a problem with Jlink that has become rampant on University-owned and home computers since approximately December or January. Basically what happens is that some / most of the time when launching Mathematica, Mathematica will hang, and eventually pops up an error about failing to connect to Jlink. Usually you can ignore the message and go on, but sometimes worse things happen unless you restart Mathematica. We have also had problems with Mathematica hanging when trying to open up the Documentation Center (though I think the Documentation Center issue may be a bit better with the 6.0.2 release). We never saw the Jlink problem until we began switching machines from Norton Antivirus to NOD32 in December/January, at which time the problem became rampant, even on quite speedy new machines. We were hightly suspicious that the problem was related to NOD32, but WRI Tech Support never was able to tell us what the issue was or how to fix it, and several people from WRI assured us that NOD32 was not the culprit. Well finally, the whole thing had become so aggravating that we tried temporarily disabling NOD32 on a few test machines. What we found was that the problem stopped when NOD32 was disabled, and returned when NOD32 was turned back on. We then tried adding the Mathematica installation directory to the NOD32 exclusions, which seems to fix the problem. All's well that ends well I guess, and I suppose we should have trusted our own instincts about NOD32 and tested it ourselves far sooner than this. -- Helen Read University of Vermont