optistruct求解时出现如下错误，怎样解决？
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optistruct求解时出现如下错误：怎样解决？
A fatal error has occurred during computations:
Element # 33874, element type HEXA.
RAM: 32 MB total, 38 MB used.
Data arrays: 157 total, 122 allocated.
DATA SET size 12 MB, ram_disk 2 MB
A fatal error has occurred during computations:
Element # 33874, element type HEXA.
RAM: 32 MB total, 38 MB used.
Data arrays: 157 total, 122 allocated.
DATA SET size 12 MB, ram_disk 2 MB
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