Variable format expression

I try to use the “variable format expression” which should work:

100 Format (1x, (2F10))

The compiler returns:
1 Syntax error at or near <
2 Syntax error at or near >

However, Format (1x, 10(2F10)) works well.

I am using PGI visual fortran, the fortran reference guide is of version 2017.

Thanks for help

Try compiling your example with pgf77. We believe variable format expressions
are a f77 extension and not part of the pgf90/pgfortran syntax.