我在sopc中产生一个.ptf文件时，出现以下提示：
# 2006.07.20 11:43:34 (*) IP functional simulation model enabled: Uncheck System Generation Simulation box for faster generation if HDL Simulation not required.
# 2006.07.20 11:43:38 (*) Checking for plaintext license.
# 2006.07.20 11:43:42 (*) Plaintext license not found.
# 2006.07.20 11:43:42 (*) Checking for encrypted license (non-evaluation).
# 2006.07.20 11:43:43 (*) Encrypted license not found. Defaulting to OCP evaluation license (produces a time-limited SOF)
请问这个Plaintext license 和Encrypted license 到底是个什么license
先谢谢了！
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