diff --git a/src/cases/var_rd_G_case.cpp b/src/cases/var_rd_G_case.cpp
index 136305c4..644bc4a5 100644
--- a/src/cases/var_rd_G_case.cpp
+++ b/src/cases/var_rd_G_case.cpp
@@ -180,9 +180,9 @@ int e3sm_io_case::run_varn_G_case_rd (e3sm_io_config &cfg,
                         double **D6_rec_dbl_bufp, /* D6 rec double buffer */
                         double **D1_fix_dbl_bufp) /* D1 fix double buffer */
 {
-    int ii, i, j, k, err, rank, ncid, *varids;
+    int i, j, k, err, rank, ncid, *varids;
     int nrecs=0, rec_no, my_nreqs;
-    size_t rec_buflen, nelems[6];
+    size_t ii, rec_buflen, nelems[6];
     double *D1_rec_dbl_buf, *D3_rec_dbl_buf, *D4_rec_dbl_buf, *D5_rec_dbl_buf, *D6_rec_dbl_buf,
         *rec_buf_ptr;
     int *D1_fix_int_buf, *D2_fix_int_buf, *D3_fix_int_buf, *D4_fix_int_buf, *D5_fix_int_buf;
@@ -315,7 +315,7 @@ int e3sm_io_case::run_varn_G_case_rd (e3sm_io_config &cfg,
     /* int (nCells): maxLevelCell */
     if (nelems[0] > 0) {
         D1_fix_int_buf = (int *)malloc (nelems[0] * sizeof (int));
-        for (ii=0; ii<nelems[0]; ii++) D1_fix_int_buf[ii] = rank + ii;
+        for (ii=0; ii<nelems[0]; ii++) D1_fix_int_buf[ii] = rank + (int)ii;
         *D1_fix_int_bufp = D1_fix_int_buf;
     } else
         D1_fix_int_buf = NULL;
@@ -323,7 +323,7 @@ int e3sm_io_case::run_varn_G_case_rd (e3sm_io_config &cfg,
     /* int (nEdges): maxLevelEdgeTop and maxLevelEdgeBot */
     if (nelems[1] > 0) {
         D2_fix_int_buf = (int *)malloc (2 * nelems[1] * sizeof (int));
-        for (ii= 0; ii<2*nelems[1]; ii++) D2_fix_int_buf[ii] = rank + ii;
+        for (ii= 0; ii<2*nelems[1]; ii++) D2_fix_int_buf[ii] = rank + (int)ii;
         *D2_fix_int_bufp = D2_fix_int_buf;
     } else
         D2_fix_int_buf = NULL;
@@ -331,7 +331,7 @@ int e3sm_io_case::run_varn_G_case_rd (e3sm_io_config &cfg,
     /* int (nCells, nVertLevels): cellMask */
     if (nelems[2] > 0) {
         D3_fix_int_buf = (int *)malloc (nelems[2] * sizeof (int));
-        for (ii=0; ii<nelems[2]; ii++) D3_fix_int_buf[ii] = rank + ii;
+        for (ii=0; ii<nelems[2]; ii++) D3_fix_int_buf[ii] = rank + (int)ii;
         *D3_fix_int_bufp = D3_fix_int_buf;
     } else
         D3_fix_int_buf = NULL;
@@ -339,7 +339,7 @@ int e3sm_io_case::run_varn_G_case_rd (e3sm_io_config &cfg,
     /* int (nEdges, nVertLevels): edgeMask */
     if (nelems[3] > 0) {
         D4_fix_int_buf = (int *)malloc (nelems[3] * sizeof (int));
-        for (ii=0; ii<nelems[3]; ii++) D4_fix_int_buf[ii] = rank + ii;
+        for (ii=0; ii<nelems[3]; ii++) D4_fix_int_buf[ii] = rank + (int)ii;
         *D4_fix_int_bufp = D4_fix_int_buf;
     } else
         D4_fix_int_buf = NULL;
@@ -347,7 +347,7 @@ int e3sm_io_case::run_varn_G_case_rd (e3sm_io_config &cfg,
     /* int (nVertices, nVertLevels): vertexMask */
     if (nelems[4] > 0) {
         D5_fix_int_buf = (int *)malloc (nelems[4] * sizeof (int));
-        for (ii=0; ii<nelems[4]; ii++) D5_fix_int_buf[ii] = rank + ii;
+        for (ii=0; ii<nelems[4]; ii++) D5_fix_int_buf[ii] = rank + (int)ii;
         *D5_fix_int_bufp = D5_fix_int_buf;
     } else
         D5_fix_int_buf = NULL;
@@ -355,7 +355,7 @@ int e3sm_io_case::run_varn_G_case_rd (e3sm_io_config &cfg,
     /* double (nCells): bottomDepth */
     if (nelems[0] > 0) {
         D1_fix_dbl_buf = (double *)malloc (nelems[0] * sizeof (double));
-        for (ii=0; ii<nelems[0]; ii++) D1_fix_dbl_buf[ii] = rank + ii;
+        for (ii=0; ii<nelems[0]; ii++) D1_fix_dbl_buf[ii] = rank + (int)ii;
         *D1_fix_dbl_bufp = D1_fix_dbl_buf;
     } else
         D1_fix_dbl_buf = NULL;
@@ -364,7 +364,7 @@ int e3sm_io_case::run_varn_G_case_rd (e3sm_io_config &cfg,
     if (nelems[0] > 0) {
         rec_buflen     = nelems[0] * nD1_rec_2d_vars;
         D1_rec_dbl_buf = (double *)malloc (rec_buflen * sizeof (double));
-        for (ii=0; ii<rec_buflen; ii++) D1_rec_dbl_buf[ii] = rank + ii;
+        for (ii=0; ii<rec_buflen; ii++) D1_rec_dbl_buf[ii] = rank + (int)ii;
         *D1_rec_dbl_bufp = D1_rec_dbl_buf;
     } else
         D1_rec_dbl_buf = NULL;
@@ -372,7 +372,7 @@ int e3sm_io_case::run_varn_G_case_rd (e3sm_io_config &cfg,
     if (nelems[2] > 0) {
         rec_buflen     = nelems[2] * nD3_rec_3d_vars;
         D3_rec_dbl_buf = (double *)malloc (rec_buflen * sizeof (double));
-        for (ii=0; ii<rec_buflen; ii++) D3_rec_dbl_buf[ii] = rank + ii;
+        for (ii=0; ii<rec_buflen; ii++) D3_rec_dbl_buf[ii] = rank + (int)ii;
         *D3_rec_dbl_bufp = D3_rec_dbl_buf;
     } else
         D3_rec_dbl_buf = NULL;
@@ -380,7 +380,7 @@ int e3sm_io_case::run_varn_G_case_rd (e3sm_io_config &cfg,
     if (nelems[3] > 0) {
         rec_buflen     = nelems[3] * nD4_rec_3d_vars;
         D4_rec_dbl_buf = (double *)malloc (rec_buflen * sizeof (double));
-        for (ii=0; ii<rec_buflen; ii++) D4_rec_dbl_buf[ii] = rank + ii;
+        for (ii=0; ii<rec_buflen; ii++) D4_rec_dbl_buf[ii] = rank + (int)ii;
         *D4_rec_dbl_bufp = D4_rec_dbl_buf;
     } else
         D4_rec_dbl_buf = NULL;
@@ -388,7 +388,7 @@ int e3sm_io_case::run_varn_G_case_rd (e3sm_io_config &cfg,
     if (nelems[4] > 0) {
         rec_buflen     = nelems[4] * nD5_rec_3d_vars;
         D5_rec_dbl_buf = (double *)malloc (rec_buflen * sizeof (double));
-        for (ii=0; ii<rec_buflen; ii++) D5_rec_dbl_buf[ii] = rank + ii;
+        for (ii=0; ii<rec_buflen; ii++) D5_rec_dbl_buf[ii] = rank + (int)ii;
         *D5_rec_dbl_bufp = D5_rec_dbl_buf;
     } else
         D5_rec_dbl_buf = NULL;
@@ -396,7 +396,7 @@ int e3sm_io_case::run_varn_G_case_rd (e3sm_io_config &cfg,
     if (nelems[5] > 0) {
         rec_buflen     = nelems[5] * nD6_rec_3d_vars;
         D6_rec_dbl_buf = (double *)malloc (rec_buflen * sizeof (double));
-        for (ii=0; ii<rec_buflen; ii++) D6_rec_dbl_buf[ii] = rank + ii;
+        for (ii=0; ii<rec_buflen; ii++) D6_rec_dbl_buf[ii] = rank + (int)ii;
         *D6_rec_dbl_bufp = D6_rec_dbl_buf;
     } else
         D6_rec_dbl_buf = NULL;