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Warnings with HEC-HMS

Warnings with HEC-HMS

(OP)
Dear All Group members;


I have faced with the following warnings in HEC-HMS. Is there anyone to help me how to resolve them.
Thank you in advance.

WARNING 40012: Could not compute observed flow for element "***Stn".
WARNING 42403: Time of concentration increased to one time interval (24.0 hr) at subbasin "***_Stn".
WARNING 40012: Could not compute observed flow for element "***_Stn".
WARNING 42403: Time of concentration increased to one time interval (24.0 hr) at subbasin "***_Stn".
WARNING 40012: Could not compute observed flow for element "***_Jnc".
WARNING 40017: Observed flow gage "***_Q_stn" at element "D***h" has some missing data.
WARNING 40017: Observed flow gage "***_Q_stn" at element "*******_Stn" has some missing data.
WARNING 42403: Time of concentration increased to one time interval (24.0 hr) at subbasin "***_Stn".
WARNING 40017: Observed flow gage "***_Q_stn" at element "***_Jnc" has some missing data.
WARNING 40017: Observed flow gage "***_Q_stn" at element "*** to ***" has some missing data.
WARNING 40017: Observed flow gage "***_Q_Outlet" at element "*******_Dam_Stn" has some missing data.
WARNING 42403: Time of concentration increased to one time interval (24.0 hr) at subbasin "Salma_Dam_Stn".
WARNING 40017: Observed flow gage "*******_Q_Outlet" at element "***_Outlet" has some missing data.
WARNING 20657: Hyetograph gage "*******_Pr_stn" for subbasin "*******_Stn" contains 364 missing or negative precipitation values that were set to zero.
WARNING 20657: Hyetograph gage "*******_Pr_stn" for subbasin "*******_Stn" contains 364 missing or negative precipitation values that were set to zero.
WARNING 20657: Hyetograph gage "*******_Pr_stn" for subbasin "***_Dam_Stn" contains 364 missing or negative precipitation values that were set to zero.
WARNING 40012: Could not compute observed flow for element "***_Stn".
WARNING 40013: Could not compute residual flow for element "***_Stn".
WARNING 40012: Could not compute observed flow for element "***_Stn".
WARNING 40013: Could not compute residual flow for element "***_Stn".
WARNING 40012: Could not compute observed flow for element "******_Jnc".
WARNING 40013: Could not compute residual flow for element "********_Jnc".
WARNING 41166: Control specifications time step exceeds Muskingum K for reach "***".
WARNING 41169: Muskingum routing is unstable with the given parameters for reach "Dawl Shin to Chagh".
WARNING 41166: Control specifications time step exceeds Muskingum K for reach "***ma".
WARNING 41169: Muskingum routing is unstable with the given parameters for reach "***".
WARNING 41166: Control specifications time step exceeds Muskingum K for reach "***".
WARNING 41169: Muskingum routing is unstable with the given parameters for reach "***".

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