The functions on the support https://docs.opendatakit.org/form-logic/ seems not to work on my newly configured ODK Aggregate. An Error always pops up when uploading.
If i follow Example expressions like ${bill_amount} * 0.18 the ODK Validator says
" > XForm is invalid. See above for the errors.
org.javarosa.xform.parse.XFormParseException: Invalid calculate for the bind attached to "/data/usdValue" : Couldn't understand the expression starting at this point: ?${bill_amount}... in expression ${bill_amount} * 0.18
"
Can you please post your actual form (suitably sanitized of personal data if necessary) so we might be able to confirm/determine the offending entry. thnx.
If you are using ODK Build, note that it does not support the ${} syntax for referring to other fields. If you need to refer to other fields, you can use a /data/ prefix. In your case, it looks like you would use /data/bill_amount. For fields that are in groups or repeats, the names of the groups or repeats also have to be included.