When you use the OCRPro addon, you may receive this error message returned by the member method GetErrorString() of the OCRResult class.
It is a license issue. The OCRPro licenses are yearly licenses and each license has a limitation on the number of pages allowed to be OCR’ed. The SDK will throw this error when the limitation is reached.
The license quota has been used up and extra quota needs to be purchased. Contact Dynamsoft Support for any assistance.
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