I'm using "updatecdt" to update a value in the CDT as follows,

I'm not sure without a little more context first, but updateCdt might require you to first initialize the variable you're updating with a CDT (dictionary) value with at least the structure in place.

Hi mschmitt,

Thank you for your response.

The first parameter "ac!test" is a CDT type("rndTest3", Please find attached CDT structure) and it was initialized with data. My concern about second parameter.
We need to pass only dictionary type so I need to construct dictionary like "{rndTest2:{rndTest1:{id:333}}}" with field names and values. So my question is that how to construct dictionary like {rndTest2:{rndTest1:{id:333}}} dynamically. I have only field names like {"rndTest2","rndTest1","id"} and value is 333. By using these field names and values I need to construct like {rndTest2:{rndTest1:{id:333}}}, which should be a dictionary type.

Somehow I managed to construct "{rndTest2:{rndTest1:{id:333}}}" in text type but I need it in the dictionary type only because "updatecdt" will accept only dictionary type as second parameter. I am able to construct like "updatecdt(ac!test,"{rndTest2:{rndTest1:{id:333}}}")" but it's throwing error that "Invalid dictionary". So we should pass only dictionary type as second parameter.

Please suggest me, how to construct dictionary type(second parameter as below) by using field names like {"rndTest2","rndTest1","id"} and value is 333?

updatecdt(ac!test,{rndTest2:{rndTest1:{id:333}}}).

Thanks.