28 lines
1.1 KiB
Markdown
28 lines
1.1 KiB
Markdown
# Error codes
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Your @boardname@ may encounter a situation that prevents it from running your code. When this happens, a frowny face will appear on your @boardname@ screen (see picture) followed by an error number. These are called _panic_ codes.
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Below is a list of error numbers and what they mean:
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* **10** (`MICROBIT_I2C_LOCKUP`): the @boardname@'s I2C bus is not working
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* **20** (`MICROBIT_OOM`): there is no free memory on the @boardname@
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* **30** (`MICORBIT_HEAP_ERROR`): a problem in the heap space.
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* **40** (`MICROBIT_NULL_DEREFERENCE `): there was a NULL dereference, the @boardname@ tried to manage a invalid object pointer.
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* **42** (`MICROBIT_SYSTEM_ERROR`): there's an error condition in the @boardname@ system software.
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* **43** (`MICROBIT_NO_RADIO`): the @boardname@ can't enable the radio.
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* **98** (`MICROBIT_ASSERTION_FAILED`): assertion failed, the condition in an [assert](/reference/control/assert) was false.
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```sim
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basic.showLeds(`
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# . . . #
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# # . # #
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. . . . .
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. # # # .
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# . . . #
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`)
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```
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## See also
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[panic](/reference/control/panic), [assert](/reference/control/assert),
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