**Summary** AWH simulations with 3 dimensions (or maybe more) cannot read user data input XVG files. **GROMACS version** 2022, 2023 **Steps to reproduce** gmx mdrun -v -deffnm awh -nb cpu -bonded cpu -pme cpu -ntmpi 1 -awh awh_t0.xvg See details in the attached README file. [awh_3d_userdata.zip](/uploads/57e37ebc98b6395b6849d0dbe0fe6a6f/awh_3d_userdata.zip) **What is the current bug behavior?** Error in user input: Could not extract data properly from awh_t0.xvg. Wrong data format?