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TN AppSvr152 Using the LogCustom() Function in Application Server

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This article from InSource details the usage of the LogCustom() function. The Wonderware Application Server LogCustom() built in script function writes a user-defined custom flag message in the log viewer. 


  • Author: Michael Walker
  • Published: 09/25/2015
  • Applies to: Wonderware System Platform 2014 and later




LogCustom( CustomFlag, msg );


Creates a new log flag based on the first parameter string. The first call creates the custom flag.
The message to write to the Log Viewer. Actual string or a string attribute.


The log flag is disabled by default. 
The message is always logged under the component "ObjectName.ScriptName". For example, "WinPlatform_001.script1: msg", which identifies what object and what script within the object logged the error. 
LogCustom() is similar to LogMessage(), but displays the message in the custom log flag when Log Custom is enabled.
The parameter help tooltip and Function Browser sample parameter list will show "LogCustom( CustomFlag, msg )" rather than "LogCustom( CustomFlag, Message )". "Message" is a reserved keyword.

LogCustom(EditBox1.text, "User-defined message.");

This statement writes to the Log Viewer as follows: 
10/24/2005 12:49:14 PM ScriptRuntime <ObjectName.ScriptName>: <LogFlag EditBox1> User-defined message.