when printing symmetry operations for structures with non-symmorphic space groups (e.g., SG 194 P6₃/mmc), `ph.x` crashes due to missing comma in format string that only triggers when fractional translations are printed. **Error message:** ``` At line 191 of file PHonon/PH/phq_summary.f90 (unit = 6, file = 'stdout') Fortran runtime error: Missing comma between descriptors (1x,"cryst.",3x,"s(",i2,") = (",3(i6,5x) " ) f =( ",f10.7 ^ ``` **To reproduce:** Any phonon calculation on a non-symmorphic structure compiled with gfortran 15.x. Example: B₂W (mp-569803, SG 194). **Environment:** - QE 7.5 - gfortran 15.2.0 (stricter format checking than older versions) **Root cause:** `PHonon/PH/phq_summary.f90` lines 189-190 - missing comma after `3(i6,5x)`: ```fortran WRITE(stdout, '(1x,"cryst.",3x,"s(",i2,") = (",3(i6,5x) & & " ) f =( ",f10.7," )")') isymq, ... ``` https://gitlab.com/QEF/q-e/-/blob/qe-7.5/PHonon/PH/phq_summary.f90#L189-190 **Fix:** Add comma after `3(i6,5x)`: ```fortran WRITE(stdout, '(1x,"cryst.",3x,"s(",i2,") = (",3(i6,5x), & & " ) f =( ",f10.7," )")') isymq, ... ```