-----Unable to see CDT in designer--------

Hello,

We are able to find the CDT in design(i.e in Objects or Application), but when I try to find in designer, I can't find it . Even in data type pickers also it is not available.I made it as visible and tried to save it but, it is giving an error popup message like:

------------------------------Error Evaluating UI Expression--------------------------
Expression evaluation error : [valid:false,syntaxError:false,value:Expression evaluation error: An error occurred while executing a save: Expression evaluation error at function fn!objectReadAction_appian_internal [line 4]: Types cannot be both visible and temporary]
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Can anyone suggest me why this error is occurring and what is the correction to be done for it?

Thanks in advance.

OriginalPostID-252747