在模拟冷箱时出现下面的错误，请帮助解决。
本帖最后由 donghualin0403 于 2014-6-5 11:46 编辑Processing input specifications ...
*** SEVERE ERROR IN THE "BLOCK" PARAGRAPH WHICH BEGINS ON LINE 71
BLOCK NAME: E1 MODEL NAME: MHEATX
MHEATX BLOCK "E1" IMPROPERLY SPECIFIED.
ALL STREAMS ARE GIVEN SPECIFICATIONS.
AT LEAST ONE STREAM MUST REMAIN UNSPECIFIED.
BLOCK WILL BE IGNORED.
*** SEVERE ERROR IN THE "BLOCK" PARAGRAPH WHICH BEGINS ON LINE 81
BLOCK NAME: E2 MODEL NAME: MHEATX
MHEATX BLOCK "E2" IMPROPERLY SPECIFIED.
ALL STREAMS ARE GIVEN SPECIFICATIONS.
AT LEAST ONE STREAM MUST REMAIN UNSPECIFIED.
BLOCK WILL BE IGNORED.
! Errors while processing input specifications
处理输入规格…***严重错误的“块”的段落，开始在71线模块名称：名称：mheatx E1模型mheatx块“E1”不当指定。所有数据流都给定的规格。至少一个流必须保持未指定。块将被忽略。***严重错误的“块”的段落，开始在81线模块名称：名称：mheatx E2模型mheatx块“E2”不当指定。所有数据流都给定的规格。至少一个流必须保持未指定。块将被忽略。！在处理输入规格错误
在换热器界面输入参数时说不能全部规定完，温度，压力、热负荷只规定其中的一组吗，还是要全部规定。
已解决，直接清空一组数据就可以了，但计算后不收敛。 {:1106_361:}
怎么清空？都必须输入期望值？
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