getDataFRF: local variable 'idx' referenced before assignment

[mjsaenz]

In getDataFRF at line 1030, local variable 'idx' is referenced before assignment. This is within the function getBathyTransectFromNC() and arises in the case where forceReturnAll is not True.

[mjsaenz]

Reviewing the code further, the issue seems to also require all previous if/elif statements (located between lines 1009 and 1027) to fail, as these statements all result in assigning the variable idx when true.
The following is the code which resulted in this error. It is adapted from crawlerProcessing/compareSIngleDayData.py