Using XSLTC several times produces message on stderr

[Stefan.Kaesberg]

Hi,
 
after transforming a simple DOM with a simple Stylesheet using XSLTC (w. 
xalan.jar R 2.4.1)
20 (identical) transformations (not concurrent) work fine. 
>From the 21st transformation i get some messages on stderr: 
 
mmiVerifyTpAndGetWorkSize: stack_height=2 should be zero; exit
... 15 times ...
mmiVerifyTpAndGetWorkSize: stack_height=2 should be zero; exit
 
No exception is thrown and the result seems to be correct. Do i have to worry 
about ?
Stefan