time history analysis in abaqus

[vittoria414042]

hi, I'm trying to run a dynamic analysis in abaqus but my analysis is aborted. I have one story building in steel. I set up the density and used the gravity load. I loaded my earthquake using: Create amplitude >> tabular>> copy paste my time and acceleration. For the boundary condition, I used acceleration/Angular acceleration and I put a scaling factor where my earthquake needs to be applied and I locked all the others degrees of freedom. I used Dynamic explicit.
thanks for your help.. I don't know how to fix this problem.
thanks