When an interface block is used to test arguments passed to an f77-style routine
the f77-style data declarations should be used. This is best done by cutting and pasting from the
f77 routine. On the DEC Alpha I tried using the f90-style declaration INTEGER::IBANK
for an array passed to YBOS routines where it was declared INTEGER*4. There was
no compilation error, but the array had different values within the YBOS routine than it
had in the calling routine. The problem was not present when the interface block
declaration was INTEGER*4 IBANK or when the interface block was omitted.