We have summarized the most frequently asked questions at a glance. If you have any question concerning installation or download you will find the answers here! If the answer is not satisfying, contact us.

Sudden script syntax error. For example:

script error

Script syntax error

To correct the error, the browser cache of Internet Explorer or Microsoft Edge must be cleared.
Open Internet Explorer or Microsoft Edge:

Clear browser cache in Edge:

  • Press the Ctrl + Shift + Del keys.
  • Select ” Cached data and files ” and then click ” Delete “.


  • Click on the “…” symbol in the upper right corner.
  • Select “Settings”
  • Locate the “Delete Browser Data” section. Click on “Select element to be deleted”.
  • Select “Cached data and files”.
  • Finally click on “Delete”.

Clear browser cache in Internet Explorer (IE9, IE10 and IE 11):

  • Press the Ctrl + Shift + Del keys.
  • Select “Temporary Internet Files” and then click “Delete”.


  • Click on the gear symbol in the upper right corner.
  • Select “Internet Options”
  • Select the “General” tab.
  • Locate the “Browsing history” section. Click there on “Delete…”
  • A new window will open. Disable “Keep Preferred Web Site Data” and enable “Temporary Internet Files”.
  • Click on the gear symbol in the upper right corner.
  • Select “Internet Options”
  • Select the “General” tab.
  • Locate the “Browsing history” section. Click there on “Delete…”
  • A new window will open. Disable “Keep Preferred Website Data” and enable “Temporary Internet Files” and “Cookies”
  • Finally click on “Delete”.

I can’t print all of a sudden. Printing does not start even though everything is set correctly.

Check if you have TrendMicroSystems Worry-Free Business Suite installed. Probably the LvPrint.exe was deleted by the antivirus program.

  1. Add the following folders as exceptions to TrendMicroSystems Worry-Free Business Suite:
    C:\Windows\SysWOW64\LvMask (incl. all sub folders) or C:\Windows\System32\LvMAsk [32bit Systeme]
  2. Add the installation paths of the LV to the software as an exception.
    (Standard: C:\Program Files (x86)\LV\Waerme or. C:\Program Files (x86)\LV\Stress etc. )

Reinstall the LV program with antivirus and administration rights disabled.

Error: LV PIPE ADDIn is listed several times in Excel.

This is a problem of Excel 2016 and macros.

SolutionDo not permanently register PIPE as an AddIn!

Go to the Add Ins:
File – Options – Add-Ins – Excel AddIns – Go to
make sure that the check mark for Pipe2 is notset!

Always start Pipe2 via the program icon instead:

Error message during installation: “An error occurred while copying the data”.


Fix: The installation program runs automatically with administration rights. Please check whether the selected installation path (or drive) is also mapped for the administrator (drive letter assigned) and not only for the user running the installation program.
If necessary, the program is still in use by another user and cannot be overwritten by the installation file.

To resolve this problem, you can configure Windows to make network drive mappings known in all logon sessions of the current user instead of just one. To do this, create the following in the registry in the key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System a new entry of the type “DWORD value (32-bit)”, call it EnableLinkedConnections and assign a value of 1 to it. After a Windows restart (logout is not enough) your login script should work as desired.

Error message in the FEM module: “Error when opening z8801.bny” or similar.

Fix: Delete all files in the directory: C:\Users’USERNAME’\AppData\Local\VirtualStore\Program Files\LV\Fest\Fem\
or delete all .TXT files in FEM folder of program directory (C:\Program Files (x86)\LV\Fest\Fem)


Set up write permission for the FEM folder, which is a subfolder of the STRENGTH directory. If this is not possible, install the program to another location where write permission can be granted.

When starting the LV strength calculation program, the installer of an external program (e.g. Autocad) is called and the LV program does not start or starts delayed.

Fix: Repair the installation of the external program (e.g. Autocad)

For Autocad: Detail Link 

Material database does not provide any data. Search box is red. When searching for materials, the message ‘No valid data’ appears.

Fix: Delete the lvw.config file in the user directory:

C:\Users’USERNAME’\AppData\Roaming\Lauterbach Verfahrenstechnik\lvw.config

Files containing module 1591 can no longer be printed.

Fix: Update the calculation before printing with “CTRL-F7”.

Since version 8.24.1, files containing module 1591 can only be printed if the calculation is updated with ‘Ctrl-F7’ before printing.

After an update from version 8.8.x to version 8.9.x the program freezes during printing and cannot be closed normally anymore.


Delete LvMask folder:
C:\Windows\SysWOW64\LvMask, or, if it doesn’t exist:
Then execute the LvMask.exe in the program directory:
By default: C:\Program files (x86)\LV\Fest\LvMask.exe
After that everything works fine again.

F-Secure reports virus or unwanted program in file LVPipeOPGL2.exe or deletes the file unasked. This means that the graphics in LV PIPE II no longer work.

It’s a false positive in F-Secure’s heuristics. The file is required for the Pipe program.

The file ‘LVPipeOPGL2.exe’ was classified as ‘FALSE POSITIVE’. This means that this file is not dangerous and is an error message from F-Secure.
The detection pattern is removed with the current update of the F-Secure virus definition file.

After a Microsoft EXCEL (Office) update after 09.12.2014, the program PIPE II no longer works correctly. Error messages appear.

This is a bug in the Microsoft Update you can fix it as follows:

  • Close Excel
  • Start the Windows Explorer
  • Select the system drive (usually C:)
  • Search for *.exd files
  • Delete all the files you find
  • Restart Excel

If this does not help, uninstall the related update:

  • Security Update for Microsoft Office 2007 (KB2596927)
  • Security Update for Microsoft Office 2010 (KB2553154)
  • Security Update for Microsoft Office 2013 (KB2726958)

Microsoft offers Fix Its for the problem: https://support.microsoft.com/en-us/kb/3025036

AVIRA reports virus or unwanted program in file PipeDXF2.exe (‘TR/Dropper.Gen5).

This is a false indication in the heuristics of Avira. The PipeDXF2.exe is required for the program Pipe.

You can define exceptions in Avira so that the message does not appear again. To do this, enter the PipeDXF2.exe at ‘System Scanner – >Search – >Exception’ and at ‘Realtime Scanner – > Search – >Exception’. The file ‘PipeDXF2.exe’ was classified as ‘FALSE POSITIVE’. This means that this file is not dangerous and an error message from AVIRA.
The detection pattern is removed with the update of the virus definition file (VDF)

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