ndbm error no 28

Perl 5.6.1 on Solaris

While storing a value to a dbm file (hash file) I get this error:
"ndbm store returned -1, errno 28, key "11000-120" at excond.pl line
313, <INFILE> line 331."

I think I may have reached the limit to the amount of data I can store
in a record. What is this limit? 2K? I don't think I have more than 1024
bytes in my record.

I do have ascii values 1, 2, and 9 in there, they are used as field
separators and subfield separators. 9 is tab. Aren't any ascii values
allowed in the data?

This is how I'm opening the hash file:
$dbfile="cond";
dbmopen(%data,"$dbfile",0666) || die "Could not open dbm file $dbfile.
$!.";
$data{$key}=$s; # where $s contains my data

Thank you.

.