Compiler Error

[uChiron]

I'm playing with Match Pattern to filter some specific data of one large string. Wiring the whole string decrease the performance agressively, so i've decided to process small subset's of data at time. But the fixed string set, sometimes, give me a useless part of the string and the match pattern give me a empty match (Expected behavior here, cause there's few strings to collect).  After this, i've decided filter the array elements (for loop output) using the empty string/path comparison, but....

LabVIEW 2013 SP1.

PS: Yes, i've tried the always copy function, but no sucess 😞  http://www.ni.com/white-paper/8145/en/   (Search for compiler error)

PS: I know there's different solutions for my problem.

PS: Yes, bad english 

VI and Data attached.

[PiDi]

Can be easily reproduced - it seems that some of the string functions, combined with conditional auto-indexing tunnel in parallel for loop creates this error. See attachment, call for someone from R&D to fix it (somewhere around LabVIEW 2027 😉 )

[uChiron]

I really hope this get fixed soon 

[RavensFan]

Confirmed for me as well.

Easiest fix is to get rid of the parallel loop configuraiton.

You can get rid of the conditional tunnel.  But in order to make that work, you'll need to do something else with your array (shift register and build the array as you go will force you to get rid of the parallel For Loop) or clean up your array after it is built unconditionally.

[0utlaw]

This issue was reported as CAR #404512.  For now, it appears that the workaround described for Known Issue #67753 also resolves this problem- placing an Always Copy primitive on the output of the match pattern function allows the VI to compile and run correctly.

Regards,

[Jeff-P]

CAR 404512 discussed in this thread was fixed in  LabVIEW 2014.  For a more complete list of bugs fixed in LabVIEW 2014, check the LabVIEW 2014 Bug Fixes. You can download an evaluation copy of LabVIEW 2014 at www.ni.com/trylabview/ or if you have an earlier version of LabVIEW installed and an active SSP subscription, you will be able to download the latest version of LabVIEW through NI Update Service.

Regards,

Jeff Peacock 

Product Support Engineer | LabVIEW R&D | National Instruments | Certified LabVIEW Architect