If not why?
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Hi Mayank,
CDT can be passed as a parameter in a process model. There might be a few issues if the CDT is passed by reference and the same CDT type is modified and active instances exist.
Please refer https://docs.appian.com/suite/help/18.3/Sub-Process_Activity.html
https://docs.appian.com/suite/help/18.3/Sub-Process_Activity.html#passing-a-process-variable-as-a-reference for more info.
Is your query regarding any specific use case. If so, if you can describe that, we would be able to provide more information.
Thanks,
Hema