Can't remount after creating and unmounting

[Iar De]

I've created a sdfs filesystem with:
sudo mkfs.sdfs --volume-name=sdfss0p0 --volume-capacity=284974MB --base-path=/mnt/sdg1-kons/raw/

It successfully created with the following text:
Attempting to create SDFS volume ... Volume [sdfss0p0] created with a capacity of [284974MB] check [/etc/sdfs/sdfss0p0-volume-cfg.xml] for configuration details if you need to change anything
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Then I mount it with:
sudo mount.sdfs sdfss0p0 /mnt/sdg1-kons/sdfs-p0/

It successfully mounts with the following message:
Running Program SDFS Version 3.5.7.1 build date 2017-09-27 06:03 reading config file = /etc/sdfs/sdfss0p0-volume-cfg.xml multiplier=32 size=8 mem=36484672 memperDB=4560584 bufferSize=1073741824 bufferSizePerDB=134217728 Loading Existing Hash Tables |))))))))))))))))))))))))))))))))))))))))))))))))))| 100% Mounted Filesystem
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Then, I unmount it:
sudo umount /mnt/sdg1-kons/sdfs-p0

The text output:
Filesystem is unmounted Closing Hash Tables |))))))))))))))))))))))))))))))))))))))))))))))))))| 100%

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Then, I try to mount it again:
sudo mount.sdfs sdfss0p0 /mnt/sdg1-kons/sdfs-p0/

And it fails with the following error:
Running Program SDFS Version 3.5.7.1 build date 2017-09-27 06:03 reading config file = /etc/sdfs/sdfss0p0-volume-cfg.xml java.lang.NumberFormatException: For input string: "278,29" at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043) at sun.misc.FloatingDecimal.parseFloat(FloatingDecimal.java:122) at java.lang.Float.parseFloat(Float.java:451) at org.opendedup.util.StringUtils.parseSize(StringUtils.java:102) at org.opendedup.sdfs.io.Volume.(Volume.java:225) at org.opendedup.sdfs.Config.parseSDFSConfigFile(Config.java:394) at org.opendedup.sdfs.servers.SDFSService.start(SDFSService.java:69) at fuse.SDFS.MountSDFS.setup(MountSDFS.java:214) at fuse.SDFS.MountSDFS.init(MountSDFS.java:253) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.commons.daemon.support.DaemonLoader.load(DaemonLoader.java:207) Exiting because java.lang.NumberFormatException: For input string: "278,29" Service exit with a return value of 255

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The reason, I've tried to test mounting/unmounting/remounting is because, it failed to remount after I written data to it. I thought, at first, that it couldn't mount, because the raw data became corrupt, but it can't remount even when no data is written. I tried it several times.