How can i do to search some records that have portal rows with empty values?:

You actually never need to. Searches in portal rows search the main file and not records in the related file. If you need to find records with no related records, create a field in your main file defined as "Count(Relationship::Any Field)" and search for zero.

-bd

Searching portals or related fields also forces FM to create a “temporary” cross-file index, which, with lots of records takes ages – don’t do it! That’s the rule here.

Rigsby

PS: There are lots of tricks to get around this problem – but to help, we would need more information.

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Originally posted by Rigsby:

Searching portals or related fields also forces FM to create a

I’m not quite sure where you got the information that there is no such thing as a “cross-file index”! This term comes from Filemaker itself, not from me. If you search a portal, you are right, FM uses the index from the related file and the search performs pretty much as though you performed it on the file itself. However, if you enter search criteria in a local field and in a portal, FM has no constant index for this search, and thus creates a cross-file index. This problem is explained fully on FM’s homepage in the technical area, and touched on in Scriptology from Petrowsky & Osborne. Test this – create a calculation field that joins a value from file A with a value from file B, then enter search mode and try to paste from the index!!! No way – can’t do it, because there is no index.

Rigsby