> My question now is, how to prevent those printout?
The output looks to me like output from the CML import filter.
But then the output should only be given when a CML file is loaded.
(A grep on the source code indeed shows that the string "setAtomProp"
only occurs in JmolCDO, which is used for reading CML...
Could you check that it *does* do this process for each time
something is drawn, and the message repeat themselves...?