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Error when trying to retrive data from the network

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Posted on by CU26030508-1

Hi ALl, i have created a power app for a mobile device and I am seeing the error "Error when trying to retrive data from the network" every time I log into the app and try to use it. I do not see the error when I use it on my laptop, only on the mobile app, power app. 



This is on the on start of my app - 



Any idea where else I can trouble shoot?



Set(varUserEmail, Trim(Lower(User().Email)));
Set(showCompLoadingScreen, false);
If
(
    IsBlank(Location.Latitude) || IsBlank(Location.Longitude), 
    Notify("Please turn location services in Power Apps on", NotificationType.Error), 
    Notify("Location Connected", NotificationType.Success)
);
Collect(
    colDevices,
        Filter('Engineer Device Tables',
            'Auditor Email' = varUserEmail,
            Approved = 'Approved (Engineer Device Tables)'.No));

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Building Power Apps

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11manish 1,052 on at

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On mobile, this usually means:

A data source call failed

OR a device permission blocked execution

OR OnStart failed partially

Location() function (HIGH probability issue)

IsBlank(Location.Latitude) || IsBlank(Location.Longitude)

On mobile:

If location permission is OFF

OR user hasn’t granted permission yet

On mobile, this fails if:

Possible reasons:

Network latency / timeout

Delegation issue

Permission issue on datasource

Connector not authenticated on mobile

Large dataset

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MS.Ragavendar 6,422 Super User 2026 Season 1 on at

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@CU26030508-1,

Users must enable Location → Always / While using app, Power Apps does not always auto‑prompt.

Why this error happens only on mobile?

Error when trying to retrieve data from the network on mobile usually means something in OnStart failed before the app finished loading.

On desktop, Power Apps is more forgiving. On mobile, any blocking failure in OnStart = generic network error.

IsBlank(Location.Latitude) || IsBlank(Location.Longitude)

Do NOT block logic in OnStart with Location() Move it to OnVisible of first screen Or wrap it safely

IfError(

Location.Latitude,

Notify("Location permission required", NotificationType.Error)

)

✅If this helped, please Accept as Solution to help others ❤️ A Like is appreciated 🏷️ Tag @MS.Ragavendar for follow-ups.

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CU26030508-1 18 on at

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Thanks for your reply @11manish.

Location() function (HIGH probability issue)

IsBlank(Location.Latitude) || IsBlank(Location.Longitude)

tried this, it did not work. Need to check if there is any issue on datasource permission

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CU26030508-1 18 on at

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hmmm, so when I hit the begin button after selecting a project and moving to the second screen, it throws the error, but when i click the back button and reselect the proejct and click begin again, it does not show.
I tried doing this multiple times, it did not show.

it only shows the first time i click on begin.

This is the on select propert of the begin button on the welcome screen (screen 1)

If (

IsBlank(drpWS_ProjectSelect.Selected.Value),

Notify(

"Select project from dropdown",

NotificationType.Information

),

Set(

varSelectedProject,

LookUp(

Projects,

'Project Name' = drpWS_ProjectSelect.Selected.Value

)

);

ClearCollect(

colDevices,

Filter(

'Engineer Device Tables',

'Auditor Email' = varUserEmail , 'Project ID' =Text(varSelectedProject.'New table') , Approved = 'Approved (Engineer Device Tables)'.No

)

);

Navigate('Assign Location Screen'));

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CU26030508-1 18 on at

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I FOUND OUT THE ERROR.
It was on the format of the clear collect.

it was initially seperated by && instead of comma ( , )
ClearCollect(

  colDevices,

  Filter(

  'Engineer Device Tables',

'Auditor Email' = varUserEmail && 'Project ID' =Text && (varSelectedProject.'New table') && Approved = 'Approved (Engineer Device Tables)'.No

  )

i had to replace the && with , as seen below

ClearCollect(

  colDevices,

  Filter(

  'Engineer Device Tables',

'Auditor Email' = varUserEmail , 'Project ID' =Text(varSelectedProject.'New table') , Approved = 'Approved (Engineer Device Tables)'.No

  )

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