SubProcess outputs

Hello,

can someone help with this issue.

I have a process model that retrieves data into  a variable defined as a multiple of CDT.

The variable is then passed as a parameter to a sub-process, and because it is a CDT and may change it is also defined in the sub-process outputs.

I can see multiple records being passed correctly to the sub-process but when the sub-Process ends, the output only has one record.

Both variables in the main process and sub process are of the same type and have been defined as multiple.

I can see in the process history of the sub-process that the CDT has two records, and this does not change and that the main model starts with two records and is changed to one after the call to the sub-process

Any ideas why data is being lost?

Many thanks

SimonJ