When merging two OpenFlows WaterGEMS models, hydraulic elements such as pipes, junctions, pumps, tanks, and valves are transferred successfully into the destination model.

However, graphs created in the source model are not preserved during the merge process.

Graphs are commonly used to analyse simulation results such as pressure, flow, tank levels, and pump performance. In large projects, especially multi-zone models, many graphs are created for analysis and reporting.

Currently, users must recreate these graphs manually after merging models, even when the referenced elements already exist in the destination model.

It would be helpful if WaterGEMS could preserve or transfer graph definitions when merging models.

This feature would save time, reduce repetitive work, and improve modelling efficiency, especially for large or complex water distribution models.