[Wien] error in lapw2

[ben amara imen]

hello
 I'm working on compound with spinell symetry
 When I do ' runsp_lapw' there is  this following error :

 error in Lapw2
'l2main' -QTL-B.GT.15.? Ghosbands, check scf files

But the strange that I did before the same calculation with the same
compound and it worked well!!!!
 Can some one help me Please
 best regards
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