Emb-145 first officer reported a track deviation on approach when the FMS reverted to roll mode; app...

Narrative:

Cleared to descend via drllr 4 arrival. ATC changed runway assignment to 26L. We didn't notice in time that the FMS had domno twice. After passing domno the autopilot went into roll mode. We put it back into LNAV but ATC gave us a heading to fly and told us to go direct the next fix.the FMS puts two fixes in when changing runways. If we don't trap this error; the autopilot will not lead the turn and will instead go into roll mode after passing the fix that was duplicated. Obviously this put us into an undesired aircraft state and possible traffic conflict. The company can fix this known error. The RNAV arrival is already busy enough as it is and it's unacceptable for the company to allow this to continue and degrade safety by not fixing this known issue. As it is; the company puts more burden on the crew by just emailing us about this known issue instead of just fixing it already. Please compel the company to fix this known issue as soon as possible in their letter of correction as a condition for them to be admitted into this report; as they are equally culpable.

Original NASA ASRS Text

Title: EMB-145 FO reported a track deviation on approach when the FMS reverted to roll mode; apparently related to a known duplicate waypoint anomaly.

Narrative: Cleared to descend via DRLLR 4 arrival. ATC changed runway assignment to 26L. We didn't notice in time that the FMS had DOMNO twice. After passing DOMNO the autopilot went into roll mode. We put it back into LNAV but ATC gave us a heading to fly and told us to go direct the next fix.The FMS puts two fixes in when changing runways. If we don't trap this error; the autopilot will not lead the turn and will instead go into roll mode after passing the fix that was duplicated. Obviously this put us into an undesired aircraft state and possible traffic conflict. The company can fix this KNOWN error. The RNAV arrival is already busy enough as it is and it's unacceptable for the company to allow this to continue and degrade safety by not fixing this known issue. As it is; the company puts more burden on the crew by just emailing us about this known issue instead of just fixing it already. Please compel the company to fix this known issue as soon as possible in their letter of correction as a condition for them to be admitted into this report; as they are equally culpable.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1241209
Time
Date	201502
Local Time Of Day	0601-1200
Place
Locale Reference	ZHU.ARTCC
State Reference	TX
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	EMB ERJ 145 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR DRLLR 4
Component
Aircraft Component	FMS/FMC
Person 1
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

Emb-145 first officer reported a track deviation on approach when the FMS reverted to roll mode; apparently related to a known duplicate waypoint anomaly.