LANSA and VLF components can be incorrectly recognized as an unwanted program by some anti-virus software

Date: 3 August 2010
Product/Release: Visual LANSA Framework - All Versions
Abstract: The VLF component DW_T01.DLL is recognized as a virus by some anti-virus software
Submitted By: LANSA Technical Support
Updated: 4 July 2013


Some anti-virus software, for example AVIRA's AntiVir, can incorrectly flag LANSA shipped DLLs as potential virus or unwanted program during a Visual LANSA installation. If files are flagged and subsequently quarantined, deleted, renamed or denied access by the anti-virus software, this will cause both LANSA and VLF application failures.

Some objects that have been reported to LANSA as flagged as unwanted programs are


The Installing LANSA on Windows Guide states the following in 2.2 Visual LANSA General Checklist.

Before starting, you should have:

  • Turned off your anti-virus software. Please leave it off while running the install/upgrade.

To avoid potential install or execution failures, you should follow the recommendation above during a Visual LANSA install. If the file has already been flagged and quarantined, you should follow the anti-virus software's instructions to release the file from quarantine.