Universal Robots Forum

RPC: Did not finish before completing

I’m doing a very basic RPC calls to a python node which performs a socket communication with a third party vision system.
The communication seems to be working well, all values are being received properly, however I m facing a strange RPC: Did not finish before completing error on returning result back to the URsim:

Relevant sources and RPS Error are shown in the figures

Any ideas what might help?

1 Like

Hi @durovsky,

Afraid this is not an error I’ve seen before… and it’s not the most informative :slight_smile:

Have you tried cutting down your get_result() function in Python to test if it still occurs?

I have managed to solve it finally. The problem was on the Python side, struct.unpack returns a tuple so it needs to be indexed before returning to the URSide as a pose dictionary.

Wrong: target = [x_pos, y_pos, z_pos, x_rot, y_rot, z_rot]
Correct: target = [x_pos[0], y_pos[0], z_pos[0], x_rot[0], y_rot[2], z_rot[0]]

But exactly as you said, this error message is not very informative

2 Likes

Ah ok, glad you found the issue. We have reported an issue internally concerning lack of documentation for our XMLRPC client.