Missing parameter(s) for operator +u: +

[Chaitanya]

I am getting the "Missing parameter(s) for operator +u: +" following error, when I tried to add sum of two custom fields and  return the values into other Number type custom field.

[Edwin Stol]

You might want to check https://community.atlassian.com/t5/Jira-Software-questions/How-to-add-Null-Value/qaq-p/1338590 for the provided null-value check.

[Nic Brough -Adaptavist-]

You'll need to explain what you are doing and where, not just give us an out-of-context error message.  All we can tell you from this is that you'll need to correct whatever you've put in, such that you give the +u a parameter to work with.

[Nina Gogeshvili]

I'm using math smart value in JSON (more options..) /Automation, same error msg. all used fields are number fields. What is +u parameter?  

{
"fields": {
"customField_10185": {{#=}}{{issue.customfield_10186}}+{{issue.customfield_10187}}+{{issue.customfield_10188}}+{{issue.customfield_10189}}+{{issue.customfield_10190}}+{{issue.customfield_10191}}+{{issue.customfield_10192}}{{/}}

}
}

[Nina Gogeshvili]

founded  |0 

{{issue.customfield_10186|0}}+{{issue.customfield_10187|0}}+{{issue.customfield_10188|0}}+{{issue.customfield_10189|0}}+{{issue.customfield_10190|0}}+{{issue.customfield_10191|0}}+{{issue.customfield_10192|0}}{{/}}