Legacy parallel port or floppy-disk hardware keys (dongles) do not work on modern laptops. How to Install and Fix VersaPro 204 on Modern Windows
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Many users report that after upgrading their operating system (for example, from Windows 2000 to Windows XP), VersaPro refuses to store logic to the PLC. The dreaded appears when attempting to perform a run-mode store. This typically stems from compatibility issues with service packs or missing patches. Legacy parallel port or floppy-disk hardware keys (dongles)
Can be installed on Windows 7 and 10 using compatibility modes or virtual machines. Pentium 166 MHz or higher. Memory (RAM) 32 MB (64 MB for Windows 2000). Disk Space 30 MB for installation; 50 MB for operation. Common "Fixed" Procedures The dreaded appears when attempting to perform a
For Profibus-related issues: