After upgrade of NX, the toolbar for the SIMIT add-in does not show anymore.

This SIMIT plug-in is part of the SIMIT 10.2 install.

Solution

There are 2 options:

1) Reinstall the SIMIT MCD Add-in via the SIMIT installer;
2) or Manually repair the custom_dirs.dat:
You best check chapter 3 in "Installation Guide SIMIT MCD Add-in.pdf"

Manual setup of the SIMIT MCD Add-in 

3.1 Target directory of the SIMIT MCD Add-in

During the installation of SIMIT all necessary files for the SIMIT MCD Add-in are stored by default in the following target directory:

      C:\Program Files (x86)\Siemens\Automation\SIMIT\SIMIT MCD

The files are stored regardless of whether your system settings meet the above- mentioned requirements for an automatic installation.

 
3.2 Settings at Custom_dirs.dat von SIEMENS NX

3.2.1 Check the target directory for custom_dirs.dat.

SIEMENS NX manages the extensions used in the configuration file custom_dirs.dat. In the standard installation case, the file is in the following directory:

      C:\Programs\Siemens\NX1899\UGII\menus

Please note that this directory structure may differ depending on your SIEMENS NX version.
Using the environment variable UGII_CUSTOM_DIRECTORY_FILE you can adjust the target directory for the custom_dirs.dat file to your requirements.
You should therefore check in your system settings which target directory is referenced for the configuration file custom_dirs.dat.

 
3.2.2 Extending the configuration file Custom_dirs.dat for the SIMIT MCD Add-in

To enable SIEMENS NX to use the SIMIT MCD Add-in, it must be entered in the configuration file custom_dirs.dat. Open this configuration file in the correct target directory of your system settings and add the path specification that refers to the storage directory of the SIMIT MCD Add-in at the end of the file. In standard installation case add the following entry:

      C:\Program Files (x86)\Siemens\Automation\SIMIT\SIMIT MCD

Make sure that no quotation marks are used.
Restart NX to read the new custom_dirs.dat and load the SIMIT toolbar.

Notes and References

If needed find also:
How to disable the SIMIT add-in once installed with SIMIT 10.2 ?
How do I launch NX without the Simit add-in? (without removing the add-on)?
How can I find compatibility of SIMIT and NX MCD versions?

Caveats: Some NX MCD function may respond abnormal when SIMIT 10.2 Add-in is loaded. New SIMIT Add-in is expected start of February 2021.

Keywords:
SIMIT 10.2 
SIMIT MCD Add-in V10.2.0.0
SIMIT Add-in
SIMIT Add in
SIMIT Plug-in
SIMIT Add in
SIMIT toolbar

Hardware/Software Configuration

Platform: INTL64
OS: windows
OS Version: 1064
Product: NX
Application: MECHATRONICS
Version: V1926
Function: SIMIT

Ref: 001-8462151