The error fail to find previous application .msi file. is generated when trying to upgrade SD 3.6 to SD 3.8
There are two types of valid SD3.6 installation:
Install SD 3.6 i27 --> Install all UPs
Install SD 3.6 i37 (include UP1 and UP2) --> Install UPs
There is a bug in the upgrade package, and upgrade fails if executing it on SD 3.6 i27 + UP4
Please verify that UP4 for SD 3.6 is installed before executing the following workaround:
1. Run setup package d:\ServerDirector3.8i56.exe.
This package extracts all its files to c:\Program Files\Common Files\ServerDirector38i56 folder.
2. After all files are extracted, the Welcome to the Patch for ServerDirector 3.8.i56 screen is displayed.
Do not click on Update button.
3. To enable upgrade from: SD 3.6 i27,
Edit C:\Program Files\Common Files\ServerDirector38i56\program files\Sphera\ServerDirector\upgrade\Common\patches_config.xml file.
Change 3.6.i37 to 3.6.i27 and save the file
4. Return to the installation process.
Click on the Update button in Welcome to the Patch for ServerDirector 3.8.i56 screen.
From this point you are continuing with the regular upgrade procedure.