-> Do you use a 64-bit FB version on centos 64-bit?

Yes.

> If so, have you recompiled the UDF library for a 64-bit target?

Yes.

>
> > typedef short TISC_BlobGetSegment(int*, char*,long, long*);
>
> Last two parameters must be short and short*, respectively;
>
> > typedef struct
> > {
> > TISC_BlobGetSegment* GetSegment;
> > int* BlobHandle;
> > long SegmentCount;
> > long MaxSegmentLength;
> > long TotalSize;
> > TISC_BlobPutSegment* PutSegment;
> > }TBlob;
>
> SegmentCount, MaxSegmentLength and TotalSize must be int.
>
>

I will make these changes and retest.

Kind Regards,

Robert.