在FPGA MAP的时候出现的错误 不知道为什么啊 哪位大神解答下
时间：10-02
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ERROR:ConstraintSystem:300 - In file: top.pcf(1): Syntax error at or before '=':
' } à′ 0' is not a valid constraint type name or time spec identifier.
ERROR:Pack:1368 - Errors were detected in the existing PCF file.
' } à′ 0' is not a valid constraint type name or time spec identifier.
ERROR:Pack:1368 - Errors were detected in the existing PCF file.
你是用什么软件呀?