Applies To:
  • CitectSCADA
  • CitectHMI
Summary:
During startup, the following errors are displayed in the CitectSCADA kernel:
For ABCLX devices the error is 0x20000010 - "Failed to access the Citect Variable.DBF file"
For OPC devices the error is 0x100 - "Failed to access variable dbf."

How can I resolve these errors?
 

Solution:
There are a number of reasons why these errors could occur:
* File does not exist.
* File is already opened by another application - check your project for devices that access the units or variable dbf during runtime.
* OID Security violation.

As part of the OID security enhancements introduced in CitectSCADA V6.00, the Unit Initialisation is much stricter.
It will now conduct the following checks, before bringing the unit online:
Ensure the data and time stamp embedded in the _UNITS.RDB is newer than the modified data and time stamp on the UNITS.DBF.
Ensure the data and time stamp embedded in the _VARIABL.RDB is newer than the modified data and time stamp on the VARIABLE.DBF.

If for any reason, you have modified the UNITS.DBF or VARIABLE.DBF since compiling, you will receive the above mentioned error. The only way to then resolve this, is to recompile the project, hence making the time and date stamp embedded with the RDB file, newer than the modified time and data on the DBF.
 
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