LKBEN10856: Howto disable Dr. Watson on a terminal server (citrix) system


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LKB | Created: 02/04/2020 | Version: 0 | Language: EN | Rating: 0 | Outdated: False | Marked for deletion: False

Author: Wim Peeters - Keskon GmbH & Co. KG


Symptom

You want to disable Dr. Watson on your system after you have found it usefull for debugging

Cause

none

Solution

Dr. Watson is the application debugger that automatically starts if errors occur in applications and if these errors cannot be handled by a default procedure. For instance, Dr. Watson is often launched when an application accesses memory improperly. This requires exception handling; and if such an exception occurs, Dr. Watson is launched and saves all relevant data. However, this type of behavior is not desirable on terminal servers, except for targeted error analyses.

For this reason, Dr. Watson should be disabled on production systems by deleting the HKLM\Software\Microsoft\Windows NT\CurrentVersion\AeDebug\Debugger registry key and the drwtsn32 –P %ld –e %ld –g value. By deleting this key, Dr. Watson is disabled. Dr. Watson can also be deactivated by deleting the HKLM\Software\Microsoft\DrWatson key.

About the Author

Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.

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