FilesetRenamer in command line : java, out of memory

Hello, I have a problem with the filesetRenamer : it works with small or medium size books but I get the following message with big books : --------START------------ [DEBUG, Pipeline Core] Loading Transformer Fileset Renamer (class int_daisy_filesetRenamer.FilesetRenamer) [DEBUG, Pipeline Core] Transformer loaded from file:/C:/Program%20Files/PIPELINE/pipeline-20100125/transformers/ [STATE] Task Fileset renamer just started [DEBUG, ???] Job Parameters: - filesetRenamerInputFile:E:\DIGIBOOK\541A000\projet\ncc.html - filesetRenamerOutputPath:E:\DIGIBOOK\541A000\projet\renamed - filesetRenamerPattern:seq+label - filesetRenamerExclude:CssFile, ImageFile - filesetRenamerFilesystemSafe:true - filesetRenamerMaxFilenameLength:15 [STATE] Transformer Fileset Renamer just started [INFO_FINER, Fileset Renamer] Analyzing the input DAISY 2.02 DTB ... [INFO_FINER, Fileset Renamer] Saving the result to E:\DIGIBOOK\541A000\projet\renamed... [ERROR, Fileset Renamer] Saving the result to An error occured: Map failed. Attempting to copy unrenamed fileset to destination folder.... [ERROR, Fileset Renamer] An error occurred: Map failed. Aborting. [ERROR, Pipeline Core] Map failed org.daisy.pipeline.exception.JobFailedException: Map failed at org.daisy.pipeline.core.script.Runner.execute(Runner.java:116) at org.daisy.pipeline.core.PipelineCore.execute(PipelineCore.java:280) at org.daisy.pipeline.ui.CommandLineUI.main(CommandLineUI.java:213) org.daisy.pipeline.exception.TransformerRunException: Map failed at int_daisy_filesetRenamer.FilesetRenamer.execute(FilesetRenamer.java:169) at org.daisy.pipeline.core.transformer.Transformer.executeWrapper(Transformer.java:174) at org.daisy.pipeline.core.transformer.TransformerHandler.run(TransformerHandler.java:124) at org.daisy.pipeline.core.script.Runner.execute(Runner.java:98) at org.daisy.pipeline.core.PipelineCore.execute(PipelineCore.java:280) at org.daisy.pipeline.ui.CommandLineUI.main(CommandLineUI.java:213) java.io.IOException: Map failed at sun.nio.ch.FileChannelImpl.map(Unknown Source) at sun.nio.ch.FileChannelImpl.transferFromFileChannel(Unknown Source) at sun.nio.ch.FileChannelImpl.transferFrom(Unknown Source) at org.daisy.util.file.FileUtils.copyFile(FileUtils.java:129) at org.daisy.util.file.Directory.addFile(Directory.java:381) at org.daisy.util.file.Directory.addFile(Directory.java:327) at org.daisy.util.file.Directory.addFileset(Directory.java:503) at org.daisy.util.file.Directory.addFileset(Directory.java:463) at org.daisy.util.file.Directory.addFileset(Directory.java:448) at int_daisy_filesetRenamer.FilesetRenamer.execute(FilesetRenamer.java:165) at org.daisy.pipeline.core.transformer.Transformer.executeWrapper(Transformer.java:174) at org.daisy.pipeline.core.transformer.TransformerHandler.run(TransformerHandler.java:124) at org.daisy.pipeline.core.script.Runner.execute(Runner.java:98) at org.daisy.pipeline.core.PipelineCore.execute(PipelineCore.java:280) at org.daisy.pipeline.ui.CommandLineUI.main(CommandLineUI.java:213) Caused by: java.lang.OutOfMemoryError: Map failed at sun.nio.ch.FileChannelImpl.map0(Native Method) ... 15 more ----------END--------- I confirm that it work with smaller books. I tried to fix the values of -Xms and -Xmx size to low or high values (128, 512, 1024) but the problem persist. Can you help us ? Regards.