If your Sage Pastel product was fully functional until this message then somehow your copy has lost its license information for Pervasive which is installed when Sage Pastel is installed.
Single-user License
If you are a single license setup then you can try stopping the Pervasive Engine and re-start the engine. If this does not work, click on Help in Sage Pastel before you try open a company, click Register and follow the prompts. This will re-register your licenses. Make sure to close Sage Pastel and re-open to allow settings to change before restarting to see if the problem is corrected.
Multi-user / Server License
Sage Pastel setups with multiple licenses and a server will require a bit more fiddling to get Pervasive working again. 1st try the above under Single-user License on your server. If still no joy you can try uninstall and reinstall Pervasive and potentially your Sage Pastel product.