Cause:
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Mismatch between file type and type of access attempted.
- When opening an table as Internal, this error means that the Header is damaged.
- This error could result from an attempt to direct information to a printer or display file when the file has been opened internal.
- Similarly, a statement could be attempting to call help with a file name that does not represent a help file.
- This error could also result from an attempt to open the same file twice from the same workstation as internal and either external or display. After a file is opened internal at a workstation, only internal is allowed for additional opens on the same file.
- Another cause of this error occurs when an attempt is made to open a program file as a key file.
- You've attempted to List < a Source File
- A program file won't load in a br version prior to 4.2 because you saved it in 4.2 previously
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