Siemens SIMATIC HMI Series System Manual page 51

During the WinCC installation process, these functions are overwritten by the standard
functions supplied.
Procedure
1. Prepare existing WinCC projects for migration.
Check the used names for impermissible special characters.
2. Install WinCC V7.4. Proceed as described in the section "How to install WinCC".
You need the storage medium that contains the licenses for WinCC V7.4. Upgraded
licenses of previous WinCC versions will be lost.
3. Migrate your existing WinCC projects.
Note the corresponding "First Information > Migration" section in the WinCC Information
System.
See also
Licenses and Licensing (Page 11)
How to Install WinCC (Page 36)
How to Perform an Uninstall (Page 46)
Introduction (Page 135)
Internet: FAQ Migration V4 > V7
44029132)
WinCC: General information and installation
System Manual, 02/2017, A5E40840020-AA
(https://support.industry.siemens.com/cs/de/en/view/
WinCC Installation Notes
1.9 Upgrading WinCC
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