Diving data bug

[Graham Mullan]

We have some diving data which, unusually, will be part of a closed 
loop. I therefore wished to put some parameters in to define the 
accuracy of that data. I put in some lines using the sd command and it 
accepted the "compass" parameters OK, but refuse the "fromdepth" and 
"todepth" ones despite those particular parameters appearing and being 
accepted by the data line.

Any ideas?

Graham