Hi ​@REOGIRARD 

would you be able to share any error messages you get when you try to use CopyPart projection in API calls (type call or create), InventoryPartHandling ?

for the filling of 90+ fields, in the API task there is an option of Only Explicit Parameters. once unchecked allows to pass in fields to the api task implicitly to the API task given the name of the variable in the execution matches that of the input parameter. 

ref: IFS API - Technical Documentation For IFS Cloud

Hello ​@kamnlk 
I don’t get any error after the call
I chosen CopyPart projection => copypartset 

I added debug but looks like there is no error :
 

The last operation in the loop (Read Inventory Part) returns empty collection means the part has not been copied
 

I want to use a copy function instead of the create new entity function because I need the Part to be the same as the original, for a different site.
This is why I must not check “Only Explicit Parameters” option if I make a bloc CREATE Inv Part instead of COPY PART.

Any idea what’s wrong ?

Thank you

So I found the page using the CopyPartProjection and it seems to not fill my requirements as it create a new Master Part, which already exists.
I just need to copy inventory part / purchase part here
Gonna check in dedicated projections 

Hello, Copy Part is the good projection for my use case, I was not using it properly into my workflow but I solved it checking http calls of web app, thank you for your support