can't pocket the following shape

[AwsTry]

i'm a new at freecad and trying to learn and I want to try and pocket below but it is a complicated shape and every time I try to pocket it a new error pops out I have tried reading online but nothing helped me solve the problem I hope you can help me I have attached the file and I'm working on windows 10 i think it is an easy prob;lem but i'm still new to the program

[chrisb]

Hi and welcome to the forum!

Your sketch is not properly closed. Sketcher's validation tool helps you to identify the culprits.

I very strongly recommend to avoid the block constraint for this sketch. Having a fully constrained sketch is no end in itself, and with the block constraints you don't see anymore what the geometry is all about.

[chrisb]

There is something interesting though with Sketch001 in your model:

The sketch is fully constraint without any conflicts. If I remove Constraints 2, 11, 12 the solver reports redundant constraints. So I guess this is another example of issue #4673 or issue #4636.

Can someone else please verify?

OS: macOS 10.16
Word size of FreeCAD: 64-bit
Version: 0.20.24825 (Git)
Build type: Release
Branch: master
Hash: ccc4151b3020969450325466e385850783795325
Python version: 3.9.2
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.1
Locale: C/Default (C)