[FX-566] Fix f8c unhandled exception while stoul'ing fields - Fix8 JIRA

Fix f8c unhandled exception while stoul'ing fields

Description

This could happen when malformed input (like letters) is in the field number.

The fix prevents termination/coredump upon unhandled execption
and instead provides diagnostic information to remedy the XML file.

Environment

None

Status

Assignee

David Dight

Reporter

Evan Wies

Labels

None

Branch

dev

Products

All

Components

Fix versions

Affects versions

2.2.1
1.3.4

Priority

Minor