You can solve equipment shortages by subhiring the missing items. Now, you are able to add additional equipment items to existing subhire jobs. When you click on "subhire shortages" in the equipment tab of your project you will see all existing subhire jobs for that period. Instead of creating a new subhire job, you can now select an existing one and the equipment will be added to it.
Note: If the period of your new project is not entirely within the rental period, Rentman will mark the existing subhire job red (like in the screenshot above) to warn you. Please don’t forget to adjust the rental period manually.
This feature is included in version F80 / B87 of Rentman.