You are attempting to run a newer version of SAP2000 with a license file (lservrc) that only supports an older version.
from the new version's folder into the old version's folder. CSI Knowledge Base 5. Check for Administrative Permissions sap2000 license not recognized error 18 extra quality
The "SAP2000 license not recognized error 18 extra quality" typically occurs when the software is unable to validate the license, preventing the user from accessing the program. The error message may appear as: You are attempting to run a newer version
SAP2000 "License Not Recognized" Error 18 (specifically Sentinel RMS Error #18) if prompted or if it hangs
: Run the installer and, if prompted or if it hangs, press F4 on your keyboard to trigger the uninstallation of previous native images.
