Comment 8 for bug 123275

When you launch [ganttproject "my file.gan"] on the command line the bash variable $1 is "my file.gan" while the ganttproject script runs, but the java app tries to open "my" instead of "my files.gan".

Here's the relevant part of the log:
java.io.IOException: Unable to open the file
my
at net.sourceforge.ganttproject.GanttProject.openDocument(GanttProject.java:1897)
at net.sourceforge.ganttproject.GanttProject.open(GanttProject.java:1867)

This is due to two bugs in the ganttproject and ganttproject.sh scripts:

---- ganttproject ----
.ganttproject.sh $@

Fixed:
.ganttproject.sh "$@"

---- ganttproject.sh ----
$JAVA_COMMAND -Xmx256m -classpath $CLASSPATH:$LOCAL_CLASSPATH $BOOT_CLASS $CONFIGURATION_FILE $* >$GP_HOME/ganttproject.log 2>&1

Fixed:
$JAVA_COMMAND -Xmx256m -classpath $CLASSPATH:$LOCAL_CLASSPATH $BOOT_CLASS $CONFIGURATION_FILE "$@" >$GP_HOME/ganttproject.log 2>&1

---- Resources ----
Passing parameters with the $* or the $@ does not preserve the spaces and blanks and one parameter becomes two or more if there was a space in it. If one wants to preserve those blanks the "$@" formula needs to be used.

Bug report is filed on Sourceforge for ganttproject.sh:
http://sourceforge.net/tracker/index.php?func=detail&aid=1983774&group_id=72728&atid=535427

Patch is submitted on Sourceforge for ganttproject.sh:
http://sourceforge.net/tracker/index.php?func=detail&aid=1983778&group_id=72728&atid=535429

Patch is attached.

Cheers,
Karoly