When I use one of GFF tool ( Filter GFF data by attribute using simple expressions OR Filter GFF data by feature count using simple expressions OR Filter GTF data by attribute values_list) , I have this message : Traceback (most recent call last): File "/usr/local/bioinfo/src/galaxy/galaxy-dist/tools/filters/gff/gff_filter_by_attribute.py", line 55, in <module> attribute_types = from_json_string( sys.argv[4] ) File "/usr/local/bioinfo/src/galaxy/galaxy-dist/eggs/simplejson-2.1.1-py2.6-linux-x86_64-ucs2.egg/simplejson/__init__.py", line 384, in loads File "/usr/local/bioinfo/src/galaxy/galaxy-dist/eggs/simplejson-2.1.1-py2.6-linux-x86_64-ucs2.egg/simplejson/decoder.py", line 402, in decode File "/usr/local/bioinfo/src/galaxy/galaxy-dist/eggs/simplejson-2.1.1-py2.6-linux-x86_64-ucs2.egg/simplejson/decoder.py", line 420, in raw_decode simplejson.decoder.JSONDecodeError: No JSON object could be decoded: line 1 column 0 (char 0) A couple questions:

Are you seeing this problem on a local instance or on our public server? Is it happening for all GFF/GTF datasets or just some? Thanks, J.