added no argument case to subroutine parse

code/ysolve.f90

@@ -18,6 +18,9 @@
         !First, make sure the right number of inputs have been provided
         IF(COMMAND_ARGUMENT_COUNT().EQ.1)THEN
           CALL GET_COMMAND_ARGUMENT(1,num1char)   !first, read in the two values
+        ELSE IF(COMMAND_ARGUMENT_COUNT().EQ.0)THEN
+          WRITE(*,*)'ERROR, NO COMMAND-LINE ARGUMENT'
+          num1char = "-h"
         ELSE
           WRITE(*,*)'ERROR, TOO MANY COMMAND-LINE ARGUMENTS(MORE THAN ONE). STOPPING'
           STOP