Cannot read the variable

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An attempt to read a KAREL program variable from an opened file failed. This IO_STATUS error indicates an issue during the variable reading process, possibly due to file corruption or incorrect data type matching. The program will abort if the file_id is invalid.

• The file is not properly opened, or opened without read permissions.
• The format of the variable data in the file is incompatible with the specified KAREL read operation or variable type.
• The file_id used does not correspond to a valid opened file.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Verify the file_id corresponds to a correctly opened file with explicit read permissions.

2. 2

   Ensure the KAREL variable type declared for reading matches the data stored in the file.

3. 3

   Use the KAREL command READ file_id(cr) to clear any existing IO_STATUS error condition.