If running as administrator doesn't work, try these steps in order: Repair Installation : Go to your Control Panel, find SIMATIC Step 7 , and select Reinstall Automation License Manager (ALM)
Because s7yomlr.dll has an unconventional name, security software sometimes flags it as a false positive. cannot find language resource file s7yomlr.dll
: Installing or updating TIA Portal (e.g., V15.1 or V17) can change shared DLL files used by the older Simatic Manager, causing the "missing" error. Registry Corruption If running as administrator doesn't work, try these