Hi This is very dificcult to know. For example in developer 6i when I call to a callform we have with null parameter, the application freezes, this was not a database problem. You should start looking to your application, because the wrong key seems to be linked to some process. Other options is to reinstall windows 98, remember windows 98 is for home use, you should think in windows2000 professional for something more serious (NOT WINDOWS 2000, neither XP, windows 2000 professional) Juan Carlos Reyes Pacheco OCP -------Original Message------- From: Walid.Alkaakati@xxxxxxxxxxxxxxx Date: 12/02/04 09:41:52 To: oracle-l@xxxxxxxxxxxxx Subject: Window Freeze How are list ! ,can you help please . I have a client that has window 98 installed connected to an= oracle application ,from time to time whenever a user press a wrong key or .......or printing invoices the a= pplication freezes and we have to restart the computer ,i checked for locking or other database problems but it= seemsto be aspecial problem related to this computer ,what i need to k= now is the things that i have to check on this computer regarding oper= ating system,Ram........How and what i have to check ? Thanks for your help. Walid Alkaakati Senior Analyst ASTROLABE IT , LEBANON= -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l