Layers sometimes load, sometimes do not.

[davidzornosa]

I have a map with 3 layers, two FeatureLayer and one ArcGISDynamicMapServiceLayer. 30% of the time, the map loads perfectly, but most of time it does not. When it fails, it throws the following cryptic message:

Error: Unable to complete operation.

...,"https:"));k=h.content;var x=h.url,y=s&&h.form,F=D;v=t.isDefined(v)?v:F.useCors...

What can be causing this issue? and how can i solve it?  thanks

[thejuskambi]

Looks like some issue with connectivity with service. Check the newtork, In the Developer window--> Network tab: see if there are any error. If something is failing then you can further look why it is failing.

Also, check the ArcGIS Server logs, and see if there are any service/server related error.

Hope this was helpful.