Sometimes the error is not a true license issue but a software conflict.
If your TECS expired in March 2024, you cannot run a version of STK released in late 2025. a current stk license could not be found
Before diving into fixes, it is critical to understand STK’s licensing architecture. STK does not use a simple "license file" in your installation folder. Instead, it relies on a model or a local license file (usually license.dat ) managed by the Ansys Licensing Manager (formerly FLEXlm/FlexNet). Sometimes the error is not a true license
import os os.environ['STK_LICENSE_FILE'] = r'C:\Program Files\AGI\Licenses\STK_license.dat' # Then import STK modules from agi.stk12.stkengine import STKEngine a current stk license could not be found