Truncated file error due to array input variable

[Karel Kruger]

Hi everyone

I have a question relating to the use of arrays in FBDK. I created a basic function block, which requires a WSTRING[6] data input variable. The FB compiles, but when I run it it gives a "truncated class file" exception - I think this is due to the array input variable (as it works when I remove it). I have also tested the FB with ARRAY[] and ANY[] datatype arrays - same issue. Can you tell what is my problem?

Strange thing is, you can have a WSTRING[6] output data variable without any trouble...

I really appreciate your help!

K

[James Christensen]

"Truncated class file" is an error that results from trying to load a
class whose compilation terminated abnormally; this can sometimes
produce a .class file of zero length. You should see a compiler error
when trying to compile the offending Java class.

[James Christensen]

The problem is not with the WSTRING[6] input. Attached find 3 files,
all of which compile and run correctly: WS_GET reads a value from a
WSTRING[6] input, WS_PUT writes a value into a WSTRING[6] output, and
WS_DB combines WS_PUT and WS_GET into a simple "data base" (though a
HashTable would be a lot more flexible).
--
Best regards,
Jim Christensen

[Karel Kruger]

Hi Jim

Thank you for the reply and the attached function blocks. I downloaded your function blocks and opened them in fbdk. I could successfully compile the function blocks, but when I wanted to run it, it gave the same "truncated class file" error as before. If they worked perfectly for you, does it mean that something is not working with my compiler? What could be the possible problem?

Appreciate the help!

Regards

Karel

[James Christensen]

Karel, look at the compiled .class files in the /lib hierarchy. See if
any of them look strange, e.g., zero length.

--
Best regards,
Jim Christensen