I need to copy a text field value to Original Estimate

[Sergio Silva]

I need to copy a text field value to Original Estimate, but JIRA return error when workflow post-function is executed.

[Nic Brough -Adaptavist-]

Er, that really doesn't tell us enough to help you.

What's the error, and what does your post-function try to do? What are the users entering in the field and how are you translating it into the format the original estimate expects?

[Sergio Silva]

I created a Text Field (< 255 characters) and in a workflow transition I am using Copy Value From Field to Field post-function for copy the text field value to Original Estimate Field, but jira returns the error message "Unable to copy value from 'Especificação Funcional' to 'Original Estimate'
It seems that you have tried to perform an illegal workflow operation.
If you think this message is wrong, please contact your JIRA administrators."
I found similar reports, but with diferents fields:
https://studio.plugins.atlassian.com/browse/JSUTIL-108
https://studio.plugins.atlassian.com/browse/JSUTIL-116
https://studio.plugins.atlassian.com/browse/JMWE-80?page=com.atlassian.jira.plugin.system.issuetabpanels:changehistory-tabpanel