What is the reason if a Project Manager cannot select a Y axis field when adding a bar chart to a task report?

The reason a Project Manager cannot select a Y axis field when adding a bar chart to a task report relates to the grouping structure of the report. When creating visualizations like bar charts, data must be organized or grouped appropriately to supply meaningful axes.

If there is no grouping established within the report, the system lacks a framework to provide the necessary data for the Y axis. Grouping helps define how the data should be aggregated or segmented, ensuring that the chart can display relevant comparisons or totals.

In summary, the absence of a grouping means that the potential Y axis values cannot be derived, preventing the Project Manager from making a selection for the Y axis in the bar chart format.