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FairCom ISAM for C

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Read the last data record in a range

Short Name



ISAM function


COUNT LastInRange(FILNO keyno, pVOID recptr, pVRLEN plen)


In V12 the file number typedef was formally changed from COUNT, a two-byte value to FILNO, a four-byte value. Refer to this link for compatibility details. Four Byte File Numbering

Read the last data record in a range established by a call to AllocateRange(). If successful, the record becomes the current ISAM record for the associated data file. A successful LasttInVRange() defines a current key value set, and subsequent calls to NextInVRange() or PreviousInVRange() will read the other records in the range.

plen acts as both an input and output parameter:

  • On input, plen contains the length of the output buffer.
  • On output, the contents of plen is the actual data-record length. If the length of the output buffer is less than the actual record length, a partial read is performed. If an error occurs, plen is unspecified.



Symbolic Constant




Successful operation.



Could not satisfy and ISAM search request for index isam_fil. This error frequently indicates "End of File" reached, or "Record not Found."

The following items are the probable causes of the INOT_ERR (101).

  • Passing GetRecord() a duplicate allowed index number (keyno). GetRecord() does not support duplicate allowed indices.
  • Improper target padding. Review “Key Segment Modes” in the c-tree Plus Programmer’s Guide.
  • Not calling TransformKey() on target. Refer to “TransformKey” in the Function Reference Guide
  • Passing ctDeleteSequence() a sequence name that does not exist
  • Improper segment mode. Review “Key Segment Modes” in the c-tree Plus Programmer’s Guide.
  • ctFILBLK() is called and the file is already blocked.

See c-tree Error Codes for a complete listing of valid c-tree error values.

See also

AllocateRange(), EstimateRange(), FirstInRange(), FirstInVRange(), FreeRange(), LastInRange(), NextInRange(), NextInVRange(), PreviousInRange(), PreviousInVRange()