When saving the assembly, it stays in the progress of model check and does not respond for a long ti

I am using Creo Parametric Release 6.0 and Datecode6.0.6.0

When saving the assembly, it stays in the progress of the model check and does not respond for a long time. After changing the digital model to save, it is still the same.
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Translated the text from Simplified Chinese to English using google translate. By community moderation.
Subject: 另存装配时，停留在model check进度中，长时间不响应。
Body: 另存装配时，停留在model check进度中，长时间不响应，换过数模保存，依然如此。
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