Failure during setup

The set-up can fail during field configuration for a number of reasons. For all of these, except for one possibility given below, you will have to call the Support Astronomer or Duty Tech. Expert attention is required to avoid doing damage to the complex AF2 system. Do not type any AF2/Wyffos commands until you have obtained help.

• Occasionally the configuration fails due to an illegal move during the set-up. Although the configuration is checked for `legality' before the positioning starts, it can happen that a small error in positioning a fibre during a configuration results in a subsequent illegal move. Try to re-setup the field. This errors happen more often with a densely packed field, and running af2_configure with a larger buffer factor (1.05 instead of 1.00) will probably ensure that the problem does not occur.