the offset provided to the read_at/write_at routines has to be a multiple of the etype.

ompi/mca/sharedfp/sm/sharedfp_sm_iread.c

@@ -70,6 +70,7 @@ int mca_sharedfp_sm_iread(mca_io_ompio_file_t *fh,
     }
     /*Request the offset to write bytesRequested bytes*/
     ret = mca_sharedfp_sm_request_position(sh,bytesRequested,&offset);
+    offset /= sh->sharedfh->f_etype_size;
 
     if (  -1 != ret ) {
         if ( mca_sharedfp_sm_verbose ) {
@@ -193,6 +194,8 @@ int mca_sharedfp_sm_read_ordered_begin(mca_io_ompio_file_t *fh,
 
     /*Each process now has its own individual offset in recvBUFF*/
     offset = offsetBuff - sendBuff;
+    offset /= sh->sharedfh->f_etype_size;
+
     if ( mca_sharedfp_sm_verbose ) {
 	opal_output(ompi_sharedfp_base_framework.framework_output, 
 		    "mca_sharedfp_sm_read_ordered_begin: Offset returned is %lld\n",offset);

ompi/mca/sharedfp/sm/sharedfp_sm_iwrite.c

@@ -70,8 +70,9 @@ int mca_sharedfp_sm_iwrite(mca_io_ompio_file_t *fh,
      }
     /* Request the offset to write bytesRequested bytes */
      ret = mca_sharedfp_sm_request_position(sh,bytesRequested,&offset);
-
-    if ( -1 != ret ) {
+     offset /= sh->sharedfh->f_etype_size;
+     
+     if ( -1 != ret ) {
         if ( mca_sharedfp_sm_verbose ) {
             opal_output(ompi_sharedfp_base_framework.framework_output, 
 			"sharedfp_sm_iwrite: Offset received is %lld\n",offset);
@@ -194,6 +195,8 @@ int mca_sharedfp_sm_write_ordered_begin(mca_io_ompio_file_t *fh,
 
     /*Each process now has its own individual offset in recvBUFF*/
     offset = offsetBuff - sendBuff;
+    offset /= sh->sharedfh->f_etype_size;
+    
     if ( mca_sharedfp_sm_verbose ) {
 	opal_output(ompi_sharedfp_base_framework.framework_output, 
 		    "mca_sharedfp_sm_write_ordered_begin: Offset returned is %lld\n",offset);

ompi/mca/sharedfp/sm/sharedfp_sm_read.c

@@ -68,6 +68,7 @@ int mca_sharedfp_sm_read ( mca_io_ompio_file_t *fh,
 
     /*Request the offset to write bytesRequested bytes*/
     ret = mca_sharedfp_sm_request_position(sh,bytesRequested,&offset);
+    offset /= sh->sharedfh->f_etype_size;
 
     if (  -1 != ret ) {
         if ( mca_sharedfp_sm_verbose ) {
@@ -186,6 +187,8 @@ int mca_sharedfp_sm_read_ordered (mca_io_ompio_file_t *fh,
 
     /*Each process now has its own individual offset in recvBUFF*/
     offset = offsetBuff - sendBuff;
+    offset /= sh->sharedfh->f_etype_size;
+
     if ( mca_sharedfp_sm_verbose ) {
         opal_output(ompi_sharedfp_base_framework.framework_output,
                     "mca_sharedfp_sm_read_ordered: Offset returned is %lld\n",offset);

ompi/mca/sharedfp/sm/sharedfp_sm_write.c

@@ -71,6 +71,7 @@ int mca_sharedfp_sm_write (mca_io_ompio_file_t *fh,
 
     /*Request the offset to write bytesRequested bytes*/
     ret = mca_sharedfp_sm_request_position(sh,bytesRequested,&offset);
+    offset /= sh->sharedfh->f_etype_size;
     if ( -1 != ret ) {
         if ( mca_sharedfp_sm_verbose ) {
             opal_output(ompi_sharedfp_base_framework.framework_output,
@@ -192,6 +193,7 @@ int mca_sharedfp_sm_write_ordered (mca_io_ompio_file_t *fh,
 
     /* Each process now has its own individual offset */
     offset = offsetBuff - sendBuff;
+    offset /= sh->sharedfh->f_etype_size;
 
     if ( mca_sharedfp_sm_verbose ) {
         opal_output(ompi_sharedfp_base_framework.framework_output,