This page helps when a dashboard card is empty, shows a message instead of data, or shows data to you but not to a colleague. Read the card’s own message first: most empty cards say what they need.
First: is the data there?
Open one of the card’s devices and its Telemetry tab. If the key is not there, or its Updated time is old, the board is not the problem: see Data does not arrive.
What the card says
| The card says | Cause | Fix |
|---|---|---|
| “This card is not finished: choose its … in its settings.” | A required data field is empty | Open the card’s settings and fill it |
| “Bind a value / a data series / a table query in this widget’s settings.” | The value, series or rows slot is empty | Bind it |
| “Choose a value in the filters above to load this widget.” | The card follows a parameter that has no value yet | Pick a value in the filter bar |
| “ | A card that shows one device takes a parameter that holds a site with several devices | Pick one device, or bind the card to The device this page shows |
| “No data for this period.” | Nothing was sent in the window, or the key is misspelled | Check the key on the Telemetry tab; choose a longer window |
| No values in this window on a chart, while a value card shows a value | The key is text or true/false: only numbers have a chart history | Store a numeric copy. See Numbers, text and true/false values. |
| “No rows.” | Nothing matches the source’s filters or the window | Relax the key filters; for alarm tables try Ignore the board window |
| “No rows with valid coordinates.” | A map’s latitude and longitude columns are missing, empty or out of range | Check the column names; the device must send lat and lng, or you set them |
| “You may not see the data of this card.” | You lack the read permission for that data | Ask an administrator |
| “Widget not available” | The widget’s module is off for your organisation, or you lost access to it | Remove from board, or ask for the module |
| “Not refreshed” | Too many requests: the card shows the last data and asks again shortly | Wait; lower the card’s refresh rate |
| “Live updates unavailable — polling” | The live connection is not available | Cards refresh on their interval; nothing to fix on the board |
Parameters and key filters
A board’s parameters decide which devices or sites its cards read.
| Symptom | Cause | Fix |
|---|---|---|
| The card shows another device than you expect | The page’s parameter was set by the link you opened; your own filter choices win once you change one | Check the filter bar and the address (?p.device=…) |
| A hidden page opens empty | A hidden page needs the device or site it shows, set by the row, marker or button that opens it | Open it from the board, not from a bare address |
| A list stops at 500 devices | A resolved parameter holds at most 500 entities, the first 500 by name; a fixed list at most 100 | Narrow the parameter, or split the board |
| Some devices are missing from a list | A key filter excludes them, for example “latest temperature above 30″ excludes devices that never sent temperature | Check Manage key filters…: the key, its type (Text, Number, Boolean, Date and time) and the operation |
| The board shows nothing after a key was renamed | Cards and filters still read the old key | Update the cards, or rename back in the root flow |
See Data sources and parameters.
Windows and aggregates
| Symptom | Cause |
|---|---|
| A card shows less detail for older days | Windows over 24 hours read summaries, not every reading |
| Older parts of a long window are empty | Raw readings are kept 7 to 90 days and minute summaries at most 31 days, by your retention class; hour and day figures for the full class. See How long data is kept. |
| A window of more than a year is refused | The longest window is 366 days |
| Counter values look like a rising line | Use the aggregate increase |
A colleague sees something different
| Symptom | Cause | Fix |
|---|---|---|
| A colleague sees an empty card on a shared board | They lack the read permission for that data (devices, telemetry, alarms), or an access policy hides those devices | Check their role, groups and policies. See Groups and permissions. |
| A card is missing for a colleague | It uses a private widget only its author can see | Publish the widget, or replace it |
| Alarm counts are empty for some people | Alarm counts need the alarm read permission | Grant View alarms and alarm rules |
| A camera card is blank for a colleague | Watching needs Watch the live picture of a camera and read access to the camera’s device | See Camera limits and privacy |
| A control is greyed out | The reading is old or unknown, or they may not send that command | See Control cards |
Wall screens and display links
| The screen says | Fix |
|---|---|
| “This display link is not valid” | Check the address, or create a new link |
| “This display link was revoked” or “has expired” | Create a new link (1 to 365 days) |
| “Nothing to show” | None of the board’s cards can be shown on a display; share the custom widgets it uses |
| A card is blank on the screen | It is a 3D card (not shown on display links), or the person who made the link may no longer read that data |
See Wall screens and full screen.
Ready-solution boards
A board made from a solution template leaves out the cards that read relations or run compute scripts. Cards of a full installation read the solution’s keys; if your devices send other names, see Adapting a solution to your devices.
SCADA and site views
| Symptom | Page |
|---|---|
| Symbols do not move or change colour | Troubleshooting SCADA |
| A site or room is Unknown | No device under it sends a status key, has an open alarm or was active in the last 10 minutes. See Site status and the status key. |