This function, which is only used in tests, was not handling time series data with multiple dimensions.
This is a very old bug. It was triggered by the addition of supplemental attributes and outages to PowerSystem.jl. Tests for those features started using a system with 2-dimensional time series data. That code worked when in-memory time series data used, which happens in PowerSystemCaseBuilder when you set build_system(force_build=true).
This function, which is only used in tests, was not handling time series data with multiple dimensions.
This is a very old bug. It was triggered by the addition of supplemental attributes and outages to PowerSystem.jl. Tests for those features started using a system with 2-dimensional time series data. That code worked when in-memory time series data used, which happens in PowerSystemCaseBuilder when you set build_system(force_build=true).