Capacitor runs out of Heap Space with some BAM files

[ERROR] Execution failed!
The Flux capacitor tool run into memory problems !Please use the FLUX_MEM environment variable to increase the memory. For example: export FLUX_MEM="6G"; flux-capacitor ... to use 6 GB of memory.
[ERROR] Current memory setting : 23665 MB
[ERROR] Tool that run into memory issues: capacitor
[ERROR] Out of memory stack-trace: java.util.Collections.unmodifiableList(Collections.java:1149)
java.lang.OutOfMemoryError: Java heap space
	at java.util.Collections.unmodifiableList(Collections.java:1149)
	at net.sf.samtools.Cigar.getCigarElements(Cigar.java:50)
	at net.sf.samtools.SAMRecord.getAlignmentBlocks(SAMRecord.java:1374)
	at net.sf.samtools.SAMRecord.validateCigar(SAMRecord.java:1413)
	at net.sf.samtools.BAMRecord.getCigar(BAMRecord.java:247)
	at net.sf.samtools.SAMRecord.getAlignmentEnd(SAMRecord.java:456)
	at net.sf.samtools.BAMFileReader$BAMQueryFilteringIterator.advance(BAMFileReader.java:737)
	at net.sf.samtools.BAMFileReader$BAMQueryFilteringIterator.next(BAMFileReader.java:685)
	at net.sf.samtools.BAMFileReader$BAMQueryFilteringIterator.next(BAMFileReader.java:638)
	at net.sf.samtools.SAMFileReader$AssertableIterator.next(SAMFileReader.java:641)
	at net.sf.samtools.SAMFileReader$AssertableIterator.next(SAMFileReader.java:619)
	at barna.io.sam.SAMMappingIterator.init(SAMMappingIterator.java:39)
	at barna.io.sam.SAMMappingIterator.<init>(SAMMappingIterator.java:30)
	at barna.io.sam.SAMReader.read(SAMReader.java:116)
	at barna.flux.capacitor.reconstruction.FluxCapacitor.explore(FluxCapacitor.java:2658)
	at barna.flux.capacitor.reconstruction.FluxCapacitor.call(FluxCapacitor.java:1726)
	at barna.flux.capacitor.reconstruction.FluxCapacitor.call(FluxCapacitor.java:76)
	at barna.commons.launcher.Flux.main(Flux.java:212)