I have a very strange problem when dealing with SD files.
I read an SD file containing various properties, either with the SDF Reader node, or the Infocom MolImporter (to an SDFCell). I do some processing on the different columns, then discard some columns I don't need (Using the Column Filter), and finally write the SD file back (either with the Infocom MolExporter or the SDF Writer node. After the Column Filter, the discarded columns do not appear anymore when I look at the output, but when I open the resulting SD file, the discarded columns are back.
If I read the SD file to a Marvin Cell type, the problem does not occur.
Is there anything I don't understand in the way data are stored in an SDFCell? Or is this a bug?
Thank you for your help