diff -u -r gplcver-2.11a.linux.bin.orig/src/v_vpi.c gplcver-2.11a.linux.bin/src/v_vpi.c
--- gplcver-2.11a.linux.bin.orig/src/v_vpi.c	2005-07-07 12:38:56.000000000 -0500
+++ gplcver-2.11a.linux.bin/src/v_vpi.c	2005-10-13 14:22:11.000000000 -0500
@@ -2290,7 +2290,16 @@
    return(cbref);
   }
  /* case 2: for later time */ 
- schtim = __simtime + ticksdel;
+ if(datp->reason == cbAtStartOfSimTime)
+ {
+     // for cbAtStartOfSimTime, the specified time is absolute,
+     // not relative to the current tick
+     schtim = ticksdel;
+ }
+ else
+ {
+     schtim = __simtime + ticksdel;
+ }
  cbref = bld_cbrec(datp, CB_DELAY);
  alloc_tev_(tevpi, TE_VPICBDEL, __it_roots[0], schtim);
  hp = (struct h_t *) cbref;