That spurious error is a VEDA issue. It seems you are using some old version of VEDA, is that correct?
Old versions of VEDA may have some bugs. I remember having seen a similar issue myself years ago, when using an old version of VEDA. But there is an easy work-around: Just put HETHTHP also into Cell F12. Putting it there is correct (it is an output) and so it will do no harm, but by doing so you should get rid of the buggy error.
Of course, you should also consider upgrading your VEDA... But anyway, this is not the VEDA Forum.
Old versions of VEDA may have some bugs. I remember having seen a similar issue myself years ago, when using an old version of VEDA. But there is an easy work-around: Just put HETHTHP also into Cell F12. Putting it there is correct (it is an output) and so it will do no harm, but by doing so you should get rid of the buggy error.
Of course, you should also consider upgrading your VEDA... But anyway, this is not the VEDA Forum.