Update checkConfig.m

Author: ehennestad

+types/+util/+dynamictable/checkConfig.m

@@ -52,7 +52,7 @@ function checkConfig(DynamicTable, ignoreList)
     formatSpec = sprintf('  %%-%ds %%d', max(strlength(columnNames)));
     assert(isscalar(tableHeight), ...
         'NWB:DynamicTable:CheckConfig:InvalidShape', ...
-        ['Invalid table: all columns must have the same height.\n\n' ...
+        ['Invalid table: all columns must have the same height (number of rows).\n\n' ...
         'Detected column heights:\n' ...
         strjoin( compose(formatSpec, columnNames, columnHeights), newline) ]);