I'm simulating a simple solid-liquid fluidized bed case using cfdemSolverPiso. The coupling interval is specified as 1 which results in a CFD time step 1e-5 and DEM time step 1e-5. Everything went well at the begin until the simulation aborted at somewhere between 35s and 36s and gave fatal error as:
"cfdemCloud::dataExchangeM().timeStepFraction()>1:Do not do this, since dangerous. This might be due to the fact that you used an adjustable CFD time step. Please use a fixed CFD time step."
Actually, the runTimeModifiable was set as no. So the CFD time step couldn't be the issue. I don't know whether it's a bug or something wrong with my settings. What I guess is the precision of the time value in the simulation. The attached are my main case files and error. Could you kindly have a look at this problem?