Please check to make sure that:

1. The sample interval being used in the logger program allows a sufficient length of time for all ShapeArrays (SAAs) to be sampled, and
2. That the battery voltage supplied to the logger is greater than 11.5 V.

For details, please see 'Why is my Data Logger missing Samples?'

If possible, also check to make sure that the electrical cabling from the SAA232(-5) to the ShapeArray has not been damaged in any way. For details on using an ohmmeter to check a ShapeArray cable for damage, please see 'Hardware FAQs', Question 'How Do I Diagnose an Unresponsive ShapeArray for Cable Damage'.