DieCut of line in CartoDroid

[Rosa María Muñiz García]

Hi! I'm using CartoDroid in forestry for tracking and measurment activities. My project have one POLYLINE layer. I need to cut selected line with 'Die cut' option but receive message: 'There is no layer that can die cut entities from my layer'. What I have to do? What steps do I need? 
Please help!

Hello Mario Feger and thank you for using Cartodruid.

CartoDruid can die cut lineal features just agains polygon layers.
If in your use case, you're trying to cut a line in two, you can use a support polygonal layer to draw the sketch of the "cutting polygon" and apply die cut in your polyline layer against the polygon layer.
Keep in mind, that the result of this operation will keep just the part of the original polyline that intersects with the polygon layers, any part of the original line that doesn't overlaps with a polygon will be dismissed.
So if, for example, you are trying to split the line in two, and you want to keep both parts of the line, you need, two adjacent polygons that overlap with all the length of the line.

Please let me know if this solution works for you.