| ERROR | [FORG0003] fn: zero-or-one called with a sequence containing more than one item |
| CAUSE | It is a dynamic error if fn: zero-or-one is called with a sequence containing more than one item |
| ACTION | None |
| ERROR | [FORG0003] fn: zero-or-one called with a sequence containing more than one item |
| CAUSE | It is a dynamic error if fn: zero-or-one is called with a sequence containing more than one item |
| ACTION | None |