Produce more informative errors messages when owlapi fails to parse manchester

I have a pattern with 7 variables and an input file with 242 rows. When I try to run the file through dosdp-tools generate, I get an error message
```
An unchecked error was produced.
org.semanticweb.owlapi.manchestersyntax.renderer.ParserException: Encountered 'age category' at line 1 column 76. Expected one of:
Class name
(
{
Self
```
However, I know for sure 'age category' is a class. If I take the first 25 rows of the same file and run the tool, it works fine, so the age category label is not the problem. I am wondering if it could be throwing a strange error because the file is so large it times out. Even with only 25 rows, it takes several minutes to process.