There's no need for g_equal(). Just:
will work. To make your original approach work, you also could use:
this sets a filter on waypoints where the first two letters of the code are GC.
| QUOTE |
| Source='GC' |
will work. To make your original approach work, you also could use:
| QUOTE |
| g_Regex('^GC',Code) |
this sets a filter on waypoints where the first two letters of the code are GC.