Dear development team,

Recently I've been trying to run some simulations on a quite complex building and I keep getting the following error:

*********** DIVA 4.0.2.56 ***********

RunType: Annual Daylight
RunName: MPC Tower_Annual Daylight_Medium_Office
RunPeriod: 1/1 - 12/31
AnnualRunMode: Schedules_SDA_and_ASE
Location: TAN-SON-HOA,-,VNM
RadParam: -aa .1 -ab 4 -ad 1024 -ar 256 -as 256 -dr 2 -ds .2 -lr 12 -lw .004 -dj 0 -lr 6 -sj 1 -st 0.15
DirectThreshold: 50 W/m2
PNG background: White


Run 1: GroupsOpen all, GroupsClosed none, Grid 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49

Starting 1 annual raytrace run...
{Run 1}: ASE: generating 65 direct daylight coefficients...
{Run 1}: ASE: daylight coefficients complete (31.468 seconds)
{Run 1}: generating 65 direct & 148 diffuse daylight coefficients...
Standard DC calc failed

Unhandled Exception: System.IO.IOException: An unexpected network error occurred.

at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.WriteCore(Byte[] buffer, Int32 offset, Int32 count)
at System.IO.FileStream.FlushInternalBuffer()
at System.IO.FileStream.Flush(Boolean flushToDisk)
at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder)
at System.IO.StreamWriter.Dispose(Boolean disposing)
at System.IO.StreamWriter.Close()
at System.IO.TextWriter.SyncTextWriter.Close()
at a.a(String[] A_0)

The funny part is that if I run it in lowest I get no errors. Any idea what could be the reason for the error?

Thanks!

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Hi Pedro,

Daysim (which calculates the daylight coefficients) has been known to run out of memory with heavy models.  This usually has to do with the size of the irradiance cache.  Higher quality settings can produce more cache locations and hence eat up more memory.  My two suggestions are (1) simplifying the model and (2) reducing the number of processes to 1.  (This can be found among the Annual Daylight component's hidden inputs.)  DIVA splits the DC calc over NP processes, but this requires ~NP times the memory.

Jon

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