i created the required server.py file and put it on running, after i rosservice call //move_bb8_in_square_custom “side: 0.5
repetitions: 2” the error massage: ERROR: service [/move_bb8_in_square_custom] responded with an error: error processing request: ‘float’ object is not callable
Hi @waimanliu2010,
Welcome to the community 
.
Can you please post your server.py and a screenshot of your terminal input? From what you typed here, the service call seems wrong. Double-press ‘TAB’ twice after entering the service name. That should autofill the correct message format. Make sure you dont delete any brackets or quotation marks!
thank for your reply i already solved the problems thank