diff --git a/Source/read.f90 b/Source/read.f90
index f811d1da671..d4e6c023bd7 100644
--- a/Source/read.f90
+++ b/Source/read.f90
@@ -9231,8 +9231,10 @@ SUBROUTINE READ_OBST
                THICKEN_LOC = THICKEN
 
                IF ( (XB2>=XS-0.5_EB*DX(0)   .AND. XB2<XS) .OR. (THICKEN .AND. 0.5_EB*(XB1+XB2)>=XS-DX(0)    .AND. XB2<XS) ) THEN
-                  CALL SEARCH_OTHER_MESHES(XS-0.1_EB*DX(0),0.5_EB*(XB3+XB4),0.5_EB*(XB5+XB6),NOM,IIO,JJO,KKO,XXI,YYJ,ZZK)
-                  IF (NOM>0) THEN
+                  DX_GHOST = DX(0)
+                  CALL SEARCH_OTHER_MESHES(XS-0.1_EB*DX(0),0.5_EB*(MAX(YS,XB3)+MIN(YF,XB4)),0.5_EB*(MAX(ZS,XB5)+MIN(ZF,XB6)),&
+                                           NOM,IIO,JJO,KKO,XXI,YYJ,ZZK)
+                  IF (NOM>0 .AND. ALLOCATED(MESHES(NOM)%DX)) THEN
                      DX_GHOST = MESHES(NOM)%DX(IIO)
                   ENDIF
                   IF (XB2>=XS-0.5_EB*DX_GHOST) THEN
@@ -9242,8 +9244,10 @@ SUBROUTINE READ_OBST
                   ENDIF
                ENDIF
                IF ( (XB1<XF+0.5_EB*DX(IBP1) .AND. XB1>XF) .OR. (THICKEN .AND. 0.5_EB*(XB1+XB2)< XF+DX(IBP1) .AND. XB1>XF) ) THEN
-                  CALL SEARCH_OTHER_MESHES(XF+0.1_EB*DX(IBP1),0.5_EB*(XB3+XB4),0.5_EB*(XB5+XB6),NOM,IIO,JJO,KKO,XXI,YYJ,ZZK)
-                  IF (NOM>0) THEN
+                  DX_GHOST = DX(IBP1)
+                  CALL SEARCH_OTHER_MESHES(XF+0.1_EB*DX(IBP1),0.5_EB*(MAX(YS,XB3)+MIN(YF,XB4)),0.5_EB*(MAX(ZS,XB5)+MIN(ZF,XB6)),&
+                                           NOM,IIO,JJO,KKO,XXI,YYJ,ZZK)
+                  IF (NOM>0 .AND. ALLOCATED(MESHES(NOM)%DX)) THEN
                      DX_GHOST = MESHES(NOM)%DX(IIO)
                   ENDIF
                   IF (XB1<XF+0.5_EB*DX_GHOST) THEN
@@ -9253,8 +9257,10 @@ SUBROUTINE READ_OBST
                   ENDIF
                ENDIF
                IF ( (XB4>=YS-0.5_EB*DY(0)   .AND. XB4<YS) .OR. (THICKEN .AND. 0.5_EB*(XB3+XB4)>=YS-DY(0)    .AND. XB4<YS) ) THEN
-                  CALL SEARCH_OTHER_MESHES(0.5_EB*(XB1+XB2),YS-0.1_EB*DY(0),0.5_EB*(XB5+XB6),NOM,IIO,JJO,KKO,XXI,YYJ,ZZK)
-                  IF (NOM>0) THEN
+                  DY_GHOST = DY(0)
+                  CALL SEARCH_OTHER_MESHES(0.5_EB*(MAX(XS,XB1)+MIN(XF,XB2)),YS-0.1_EB*DY(0),0.5_EB*(MAX(ZS,XB5)+MIN(ZF,XB6)),&
+                                           NOM,IIO,JJO,KKO,XXI,YYJ,ZZK)
+                  IF (NOM>0 .AND. ALLOCATED(MESHES(NOM)%DY)) THEN
                      DY_GHOST = MESHES(NOM)%DY(JJO)
                   ENDIF
                   IF (XB4>=YS-0.5_EB*DY_GHOST) THEN
@@ -9264,8 +9270,10 @@ SUBROUTINE READ_OBST
                   ENDIF
                ENDIF
                IF ( (XB3<YF+0.5_EB*DY(JBP1) .AND. XB3>YF) .OR. (THICKEN .AND. 0.5_EB*(XB3+XB4)< YF+DY(JBP1) .AND. XB3>YF) ) THEN
-                  CALL SEARCH_OTHER_MESHES(0.5_EB*(XB1+XB2),YF+0.1_EB*DY(JBP1),0.5_EB*(XB5+XB6),NOM,IIO,JJO,KKO,XXI,YYJ,ZZK)
-                  IF (NOM>0) THEN
+                  DY_GHOST = DY(JBP1)
+                  CALL SEARCH_OTHER_MESHES(0.5_EB*(MAX(XS,XB1)+MIN(XF,XB2)),YF+0.1_EB*DY(JBP1),0.5_EB*(MAX(ZS,XB5)+MIN(ZF,XB6)),&
+                                           NOM,IIO,JJO,KKO,XXI,YYJ,ZZK)
+                  IF (NOM>0 .AND. ALLOCATED(MESHES(NOM)%DY)) THEN
                      DY_GHOST = MESHES(NOM)%DY(JJO)
                   ENDIF
                   IF (XB3<YS+0.5_EB*DY_GHOST) THEN
@@ -9275,8 +9283,10 @@ SUBROUTINE READ_OBST
                   ENDIF
                ENDIF
                IF ( (XB6>=ZS-0.5_EB*DZ(0)   .AND. XB6<ZS) .OR. (THICKEN .AND. 0.5_EB*(XB5+XB6)>=ZS-DZ(0)    .AND. XB6<ZS) ) THEN
-                  CALL SEARCH_OTHER_MESHES(0.5_EB*(XB1+XB2),0.5_EB*(XB3+XB4),ZS-0.1_EB*DZ(0),NOM,IIO,JJO,KKO,XXI,YYJ,ZZK)
-                  IF (NOM>0) THEN
+                  DZ_GHOST = DZ(0)
+                  CALL SEARCH_OTHER_MESHES(0.5_EB*(MAX(XS,XB1)+MIN(XF,XB2)),0.5_EB*(MAX(YS,XB3)+MIN(YF,XB4)),ZS-0.1_EB*DZ(0),&
+                                           NOM,IIO,JJO,KKO,XXI,YYJ,ZZK)
+                  IF (NOM>0 .AND. ALLOCATED(MESHES(NOM)%DZ)) THEN
                      DZ_GHOST = MESHES(NOM)%DZ(KKO)
                   ENDIF
                   IF (XB6>=ZS-0.5_EB*DZ_GHOST) THEN
@@ -9286,8 +9296,10 @@ SUBROUTINE READ_OBST
                   ENDIF
                ENDIF
                IF ( (XB5<ZF+0.5_EB*DZ(KBP1) .AND. XB5>ZF) .OR. (THICKEN .AND. 0.5_EB*(XB5+XB6)< ZF+DZ(KBP1) .AND. XB5>ZF) ) THEN
-                  CALL SEARCH_OTHER_MESHES(0.5_EB*(XB1+XB2),0.5_EB*(XB3+XB4),ZF+0.1_EB*DZ(KBP1),NOM,IIO,JJO,KKO,XXI,YYJ,ZZK)
-                  IF (NOM>0) THEN
+                  DZ_GHOST = DZ(KBP1)
+                  CALL SEARCH_OTHER_MESHES(0.5_EB*(MAX(XS,XB1)+MIN(XF,XB2)),0.5_EB*(MAX(YS,XB3)+MIN(YF,XB4)),ZF+0.1_EB*DZ(KBP1),&
+                                           NOM,IIO,JJO,KKO,XXI,YYJ,ZZK)
+                  IF (NOM>0 .AND. ALLOCATED(MESHES(NOM)%DZ)) THEN
                      DZ_GHOST = MESHES(NOM)%DZ(KKO)
                   ENDIF
                   IF (XB5<ZF+0.5_EB*DZ_GHOST) THEN