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The Initialize Gas Trace Weights function prepares a new database for gas tracing functions by populating the field with the model name GasTraceWeight; this field must also be associated with the GasTraceWeight weight created when the geometric network is built. Initializing also adds to this field information found in bitgates. See About Gas Tracing for a description of how bits are used to support tracing.

Before You Begin

Before using the Initialize Gas Trace Weights function, configure the gas network features with the appropriate weights and model names. More information about this is available in Configure Gas Tracing.

Also, ensure your MaxLocksPerFile Registry settings are high values (200,000 for example). A low setting will cause errors during initialization. There are three MaxLocksPerFile entries in the Registry at the following locations:

How Geometric Networks Affect Initializing Gas Trace Weights

You can use the Initialize Gas Trace Weights function before or after creating a geometric network. However, it is recommended that you run Initialize Gas Trace Weights before creating the geometric network because the initialization process will go quicker. Running this function after creating a geometric network can be very slow.

Initializing Trace Weights in SDE Geodatabases

If you are using the initialize Gas Trace Weights function on a dataset in an SDE geodatabase, it is highly recommended that you use it before registering the dataset as versioned and before you create a geometric network. If the dataset is versioned, it may require a significant amount of time to initialize trace weights. For example, the process could take several days for a dataset with more than 100,000 edges because of the overhead involved in updating weight-associated fields in a versioned database.

You can initialize trace weights in an SDE geodatabase when:

You cannot initialize trace weights in an SDE geodatabase when:

Function Availability

Below is a table that describes when the Initialize Gas Trace Weights function is available in each type of geodatabase.

Geodatabase Type	Geometric Network	Registered as Versioned	Initializing Trace Weights Available
personal	no	n/a	yes
personal	yes	n/a	yes
file	no	n/a	no
file	yes	n/a	yes
SDE	no	no	yes
SDE	no	yes	no
SDE	yes	no	no
SDE	yes	yes	yes

 

Initialize Without a Geometric Network or Versions

This procedure applies to personal and SDE geodatabases and cannot be performed on file geodatabases. Initializing trace weights before creating the geometric network is much quicker than initializing with the network already created. To initialize trace weight values before the network is created:

1. Ensure a geometric network does not exist.
   If a geometric network does exist but you want to initialize the dataset without the geometric network; drop the geometric network and compress the geodatabase.

2. If initializing an SDE geodatabase, check whether the dataset is registered as versioned.
   If the dataset is registered as versioned, delete any versions and unregister the dataset as versioned.

3. Select the dataset.

4. Click the Initialize Gas Trace Weights button.

5. ArcFM creates the following .txt files:

   • GasTraceWeightInitSQL.txt is a log file of all SQL statements that were used to update the tables.
   • GasTraceWeightInitLastStatement.txt stores only the last SQL statement that executed successfully. If this statement matches the last statement in the GasTraceWeightInitSQL.txt file, then Initialize Gas Trace Weights executed successfully.

   In Windows 7, Windows Server 2008 and Windows Server 2008 R2, these files are stored in the following directory: C:\Users\[user]\AppData\Local\Temp.

6. After initialization is complete, build or rebuild the geometric network and register or re-register the dataset as versioned.  

Initialize With Geometric Network

This procedure applies to file and personal geodatabases and cannot be performed on SDE geodatabases. Initializing trace weights when the network already exists will take more time than without the network. To initialize trace weight values after the network is created:

1. Select the gas geometric network feature class.
2. Right-click and select Gas Tracing | Initialize Gas Trace Weights.

Initialize a Dataset Registered as Versioned and With a Geometric Network

This procedure applies to only SDE geodatabases. Before using this procedure, be aware that initializing trace weights when the network already exists and the dataset is registered as versioned could take a significant amount of time and generate several conflicts.

1.  Ensure that the dataset is registered as versioned. 
2. Select the gas geometric network feature class.
3. Right-click and select Gas Tracing | Initialize Gas Trace Weights.

 

 

 

 

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