Possible polymerase run-on fragment (within 2Kbases of a reference transcript)

Question

[sandeep.kolya]

I want to know the explanation for "Possible polymerase run-on fragment (within 2Kbases of a reference transcript)". I am running the cuffcompare and in class code I am getting 'p'.

[I0110]

I have the same question. Anyone knows what is "Possible polymerase run-on fragment"? Thanks!