Nothing
Code
derive_vars_dy(datain, reference_date = TRTSDTW, source_vars = exprs(TRTSDTW,
ASTDTW, AENDTW))
Condition
Error in `derive_vars_dy()`:
! `source_vars` must end in DT or DTM or be explicitly and uniquely named.
i Please name or rename the following source_vars: `TRTSDTW`, `ASTDTW`, and `AENDTW`
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