Siebel Issue: 'diccache.dat' could NOT be rebuild Solution

Due to our work, I added 3 new columns into table 'S_INCIDENT_CON' using Tools.
But after I delete 'diccache.dat' file and started Siebel Service, I found 'Assignment Manager' component could NOT be startup.
And log file - AsgnSrvr.log - shows error messages as following,

GenericLog GenericError 1 000288324a760504:0 2009-08-04 15:11:11 (asgnobj.cpp (5027) err=1769974 sys=2) SBL-CSC-00502: Column X_ASGN_MANL_FLG does not exist in table S_INCIDENT_CON. Make sure your diccache.dat is up to date.
GenericLog GenericError 1 000288324a760504:0 2009-08-04 15:11:12 (asgnobj.cpp (5597) err=1835032 sys=0) SBL-ASG-00024: Unable to load assignment object PUB HLS Incident.
GenericLog GenericError 1 000288324a760504:0 2009-08-04 15:11:12 (asgnobj.cpp (282) err=1835032 sys=0) SBL-ASG-00024: Unable to load assignment object PUB HLS Incident.
GenericLog GenericError 1 000288324a760504:0 2009-08-04 15:11:12 (asgnsrvr.cpp (1042) err=1835032 sys=0) SBL-ASG-00024: Unable to load assignment object PUB HLS Incident.
GenericLog GenericError 1 000288324a760504:0 2009-08-04 15:11:12 (asgnsrvr.cpp (1257) err=1835032 sys=0) SBL-ASG-00024: Unable to load assignment object PUB HLS Incident.
GenericLog GenericError 1 000288324a760504:0 2009-08-04 15:11:12 (smimtsrv.cpp (1187) err=1835032 sys=0) SBL-ASG-00024: Unable to load assignment object PUB HLS Incident.
SmiLayerLog Error 1 000288324a760504:0 2009-08-04 15:11:12 Terminate process due to unrecoverable error: 1835032. (Main Thread)

But I'm sure that I have added new column(X_ASGN_MANL_FLG) - into Table('S_INCIDENT_CON') successfully, because I can find these new columns in table schema using SQLplus.
In addition, I found the 'diccache.dat' file could NOT be rebuilt.

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Solution:

Please check if forget to hit the Apply Button in Tools.