Problems with mib2c oid error yet snmptranslate works fine...

Hi List,

I'm having trouble converting MIB files to .c and .h files using mib2c. 
I'm doing as follows:

        $ MIBS="+UCD-DISKIO-MIB" mib2c -c mib2c.conf UCD-DISKIO-MIB

But I get this error:

        You didn't give mib2c a valid OID to start with.  IE, I could not 
find
        any information about the mib node "UCD-DISKIO-MIB".  This could 
be caused..............

Yet, if I do this:

         $ MIBS="+UCD-DISKIO-MIB"
         $ snmptranslate UCD-DISKIO-MIB::diskIOIndex -On 

        I get this:
        .1.3.6.1.4.1.2021.13.15.1.1.1

So, yes... the MIB is being loaded. I uninstalled all the old net-snmp 
RPM's from the system, and compiled net-snmp 5.1.3.1 configured as 
follows:

        $ ./configure --with-mib-modules=host  --with-perl-modules 

I also tried configuring net-snmp with --with-mib-modules="host 
ucd-snmp/diskio" which compiles UCD-DISKIO-MIB for me. However, I would 
like to
know why mib2c is not working for me when I want to convert a MIB file 
into a module if I'm doing exactly as the documentation says, even all the 
examples work for me, it's simply the mib2c part the one not working.

Thanks,

Jesus Altuve
Terra.com