Hi @brandonguo!
I haven't run into this issue with the ArcGISAttachmentConnector before, but the 413 error and workaround you mentioned (editing headers) is interesting and could point to a potential improvement or fix we need to make, as @j.botterill mentioned.
To help us dig into this further, would you be willing to share:
- A log file with log debug on (which gives us information about your FME version and translation process)
- A sample workspace, screenshots, or simply file that causes this issue
This should give us a clearer picture of the best approach going forward 🙂Alternatively, you can also submit a support case with us if you rather not share your process here: