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loader 0 kb of 0 kb (NaN%)

John Armstrong asked on August 4, 2021

Hi, we are currently receiving this loading screen of “0 Kb of 0 Kb (NaN%) -see attached screenshot. It did work at one time and showed actual numbers/percentages, but has stopped working and we cannot figure out why. We are using the dataSource type of ‘json’. Also, we were using the first element metdata for mapping with the types and captions, but changed it to using the mapping option and it made no difference.
An example mapping looks like this:

"tbl1232_id": {
"type": "id",
"caption": "Record Id"
"tbl1231_applicant_name": {
"type": "string",
"caption": "Applicants - Applicant Name"
"tbl1232_status": {
"type": "string",
"caption": "Status"
"tbl1232_total_request": {
"type": "number",
"caption": "Total Request"

and example data looks like:

"tbl1232_id": 1243,
"tbl1231_applicant_name": "test",
"tbl1232_status": "Open",
"tbl1232_total_request": 188

Any idea why the loader doesn’t work properly anymore?
Also, if it helps, we are currently testing v2.8.3 until we can get our angular 2.8.10 build up.


1 answer

Mykhailo Halaida Mykhailo Halaida Flexmonster August 11, 2021

Hi John,
Thank you for posting your question.
This is a known issue with the loader label which was fixed in version 2.8.14.
As an alternative to updating, you can also set a custom localization for this specific label, stored inside the messages/progressKnown key in localization files.
Hope this helps!
Best regards,

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