FX7500 TagAccess.ReadEvent hangs?

J Josko Bacic 3 years 6 months ago
14 2 0

Hello!
 
Using .NET EMDK we need to perform "TagAccess.ReadEvent" operation every 2 seconds (because a real-time RSSI strength value is needed what inventory-mode does not offer).
 
But every short red STAT bulb blinks and after cca. 1/2 hour of such operation reading hangs (crashes) with the following error:
 
HResult: -2146233088
Status Description: "Cannot perform operation as an Access operation is in progress"
MESSAGE: ReadWait
STACK TRACE:   at Symbol.RFID3.ProcessErrorCode.ThrowException(IntPtr readerHandle, String sMessage, RFIDResults results, Boolean getLastError)
   at Symbol.RFID3.TagAccess.ReadEvent(ReadAccessParams readAccessParams, AccessFilter accessFilter, AntennaInfo antennaInfo)
 
In order to solve this I have even tried to check for "Events.STATUS_EVENT_TYPE.ACCESS_STOP_EVENT" before every read-access attempt but it doesn't help because it seems in those cases before crash "Stop event" is not fired...
 
How to achieve such long running "TagAccess.ReadEvent" operation to work ?
 
Best regards!

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2 Replies

J Josko Bacic

Is there any explanation about this?

J Josko Bacic

Any help??

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