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[ferret_users] Using test_opendap with variable file name



Hi,

I am trying to use "test_opendap" within a loop that generate a URL name, but I end up getting an "unclosed quotation error" because of nested `. My script looks like:

repeat/range=1998:2010/name=yr ( \
let fname = "`URLname`/dataset_`yr`.nc"; \
let isfile = `test_opendap("`fname`")`; \
if `isfile eq 0` then; ...)

The command `test_opendap("`fname`")` is what's causing the problem, but I cannot figure out how to pass a variable file name to the test_opendap function without using a nested `.

Any help would be much appreciated.

Thanks,
Jerome


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