Modification of existing equipment in Autoplant

Hello,

I tried modifying the length of an existing vertical vessel. First, I entered the new values for the top dish, then the cylindrical part and finally the skirt.

Now the following abnormally happened:

1: The top nozzle on the dish disappeared on the model,

2: The skirt and the cylindrical part spitted into two. I have tried to join them but no luck.

Please can someone help me out. Thanks.

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