we are experiencing problems with adding custom builds in our local Galaxy. The data requirements (fasta format etc) are as specified under https://galaxyproject.org/learn/custom-genomes/ and we used NormalizeFasta with options to wrap sequence lines at 80 bases and to trim the title line at the first whitespace, just in case. However we always get: "Failed to convert Dataset" and no further information (see below). Unfortunately I can not find any clue to what is the problem in the log files.
Does anyone know what could be going wrong here? Any help would be much appreciated. Thanks!