OK data library, (brand new).  I upload one BAM file using galaxy&#39;s &quot;Add Dataset&quot;<br><br>I start a new history, titling it, &quot;testing multiple use&quot;. I import to current history.  I run a job that reads the BAM file and produces some output.<br>
<br>Everything works.  I have 13 output data sets in the history, all showing green.<br><br>Now I create a second history, called &quot;2nd use same dataset same library&quot;  Again I check the box and click &quot;import to current history&quot;<br>
Then I try to run the same job as before...<br><br>[bam_header_read] bgzf_check_EOF: Invalid argument<br>[bam_header_read] invalid BAM binary header (this is not a BAM file).<br>[main_samview] fail to read the header from &quot;/.../galaxy/database/files/000/dataset_961.dat&quot;  (Ellipsis is mine, not Python&#39;s)<br>
<br>Oh my, looking in that file space, I discover that my BAM file is at dataset_962.dat.<br><br>Was gibt?  <br><br>Michael Moore<br>.<br>