GRIP-EMS v2.3.8

An interleave action whose interval is larger than the number of steps in its block used to compile to nothing, with no warning, so the action never fired. The editor and validation now warn when an interval overruns its block, name the action and the block's step count, and suggest the Repeat count that would make it fit. Lowering the interval below the block's step count or raising the block's Repeat both clear the warning.