Error while compiling rules file /home/xxx/work/ic/pdk_oa/smic18mserf_1833_1P6M_5Ia_1TMa2_MIM20_oa_cds_2016_12_20_v1.11_0/Calibre/DRC/SmicDR10_cal018_log_sali_p1mtx_1833_V1.18_1.drc:
Error KEY18 on line 2726 of SVRF generated from TVF - NOTCH or SPACE may not be specified in EXTERNAL if an input layer is derived from OR EDGE or OFFGRID with EDGE.