When a block of sequences is selected in the sequence canvas, and one or more sequences is shorter than the
selected region, an error is generated.

Example:

gggggtttttcccccaaaaa
gggggtttttcc
gggggtttttcccccaaaaa

If the selection spanned columns 1 - 12, the sequences are exported. If a selection is made longer than 12 ie. the length of the shortest sequence, an error is generated:

Exception in thread "Thread-16" java.lang.StringIndexOutOfBoundsException: String index out of range: 177
at java.lang.AbstractStringBuilder.substring(AbstractStringBuilder.java:870)
at java.lang.StringBuffer.subSequence(StringBuffer.java:404)
at java.io.Writer.append(Writer.java:269)
at java.io.Writer.append(Writer.java:50)
at org.biolegato.sequence.data.GDEFlatfile.translateTo(GDEFlatfile.java:58)
at org.biolegato.sequence.data.DataFormat.translateTo(DataFormat.java:129)
at org.biolegato.sequence.canvas.SequenceTextArea.writeOut(SequenceTextArea.java:1890)
at org.biolegato.sequence.canvas.SequenceCanvas.writeFile(SequenceCanvas.java:1327)
at org.biolegato.sequence.canvas.SequenceCanvas.writeFile(SequenceCanvas.java:1293)
at org.biopcd.widgets.TempFile.getInstance(TempFile.java:186)
at org.biopcd.parser.CommandThread.run(CommandThread.java:202)
at java.lang.Thread.run(Thread.java:745)

Interestingly, this appears to happen in Java 1.7.0_91, but not Java 1.8. Nonetheless, it should be fixed.