Hello!
Could you please explain how are you building the expression passed to DSI::datashield.assign.expr()?
As you mention the 10.000 bytes limit I assume you are using something like:
cally <- as.symbol("...........")
DSI::datashield.assign.expr(conns, symbol, cally)
If that is indeed yoour case, just know that there is no need of passing a symbol, you can use a string and therefore bypass the 10k bytes limit impossed by the as.symbol() function. (Working example dsOmicsClient/ds.PRS.R at master · isglobal-brge/dsOmicsClient · GitHub)
Maybe this discussion also helps you Send serialized object to DS server - #3 by xescriba
If that is not your case please explain how are you trying to pass the model to the nodes so further help can be provided.
Regards, Xavier.