I'm currently experiencing convergence failure while attempting to optimize a dimeric liquid crystal molecule under the influence of an electric field. The optimization code I'm using is 'opt=z-matrix freq=raman b3lyp/6-311++g(d,p) nosymm maxdisk=55GB geom=connectivity field=x+100 scf=maxcycles=2000.' I've encountered issues, and I'm seeking assistance. Are there any suggestions or insights you can provide to help address this convergence failure in my optimization process?