Problem reading DATASET into xstring

Hi,
I am facing a curious problem where I'd appreciate a helping hand: when I read data from a dataset into a variable of fixed-length, everything works fine. When I try to do the same with a variable-length type, nothing is read.
This code works fine:
DATA binarydata(32000) TYPE x,
alen TYPE i.
OPEN DATASET filename FOR INPUT IN BINARY MODE.
READ DATASET filename INTO binarydata ACTUAL LENGTH alen.
Here alen contains the correct number of bytes read (eg. 19000).
But if I try:
DATA binarydata TYPE xstring,
alen TYPE i.
OPEN DATASET filename FOR INPUT IN BINARY MODE.
READ DATASET filename INTO binarydata ACTUAL LENGTH alen.

Here alen is 0.
Can anybody tell me what's wrong here ?
Thanks & Regards
Heiko

Hello Heiko
 If you are using NON-UNICODE system, please try by unselecting the checkbox "Unicode Checks Active" in program attributes.
 While using UNICODE system, need to use as STRING.
Reason:
In UNICODE enabled or when Unicode Checks is active, system can transfer data between structures only when both are of characater format.
In your case, the data is read in text mode i.e character format but trying to move to XSRTING which is sequence of 'X' type characters. Hence resulting in dump.
Just for your info:
The elementary data type STRING is similar to data type C and refers to a variable-length string. Accordingly, the elementary data type XSTRING is similar to data type X and refers to a variable-length byte sequence.
 Hope the above info clarifies you.
Kind Regards
Eswar

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