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Participant_label is too long or malformed error

#1 by None (edited )

I am trying to pass in some parameter variables into an otree player model from my study's particpant URL link as follows: 


However I am getting an error that "participant_label is too long or malformed" (the code works with shorter parameter values). What is the size limit for the participant label variable, and is there a way to increase it? I can't make the parameter values shorter, unfortunately.

Thanks in advance

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