在optistruct中使用DMIG技术进行模型缩减拓扑优化遇到的两个报错？ 20
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*** ERROR # 23 ***
SID 1 used on Case Control data SPC is missing in bulk data.
*** ERROR # 1908 ***
Case Control data LOAD=2 is not referenced by any bulk data
relevant for used subcase type.
wkd1106 
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