You can also use Action Parameters. Goto Step->Action Properties and click Parameters tab. There you will be able to add parameters. Specify the required output and Input parameters i.e. the variable in first action as that actions output parameter and the same in the second action as input. Syntax would be Run Action "Action1",One Iteration,Input Parameters if any, Output Parametrs if any. You will be able to find more info in help. Check out Action Parameters and Parameter() function. Hope this helps.