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+<!-- source-page: 591 -->
+
+```txt
+const double* xc, const double* yc, const double* zc, double amp, double totalTime, double stepTime, const char* surfaceName, double* bcvals)
+{
+    int i;
+    if (direction == 2) {
+    for (i = 0; i < nfacets; i++) {
+    bcvals[i] = 1.0 - xc[i] * xc[i] / 100.0;
+    }
+    }
+} 
+```
+
+<!-- source-page: 592 -->
+
+<!-- source-page: 593 -->
+
+# 2. Utility Routines
+
+• “Utility routines,” Section 2.1
+
+<!-- source-page: 594 -->
+
+<!-- source-page: 595 -->
+
+# 2.1 Utility routines
+
+• “Obtaining Abaqus environment variables,” Section 2.1.1   
+• “Obtaining the Abaqus job name,” Section 2.1.2   
+• “Obtaining the Abaqus output directory name,” Section 2.1.3   
+• “Obtaining parallel processes information,” Section 2.1.4   
+• “Obtaining part information,” Section 2.1.5   
+• “Obtaining material point information in an Abaqus/Standard analysis,” Section 2.1.6   
+• “Obtaining material point information in an Abaqus/Explicit analysis,” Section 2.1.7   
+• “Obtaining material point information averaged at a node,” Section 2.1.8   
+• “Obtaining node point information,” Section 2.1.9   
+• “Obtaining node to element connectivity,” Section 2.1.10   
+• “Obtaining stress invariants, principal stress/strain values and directions, and rotating tensors in an Abaqus/Standard analysis,” Section 2.1.11   
+• “Obtaining principal stress/strain values and directions in an Abaqus/Explicit analysis,” Section 2.1.12   
+• “Obtaining wave kinematic data in an Abaqus/Aqua analysis,” Section 2.1.13   
+• “Printing messages to the message or status file,” Section 2.1.14   
+• “Terminating an analysis,” Section 2.1.15   
+• “Obtaining sensor information,” Section 2.1.16   
+• “Accessing Abaqus materials,” Section 2.1.17   
+• “Accessing Abaqus thermal materials,” Section 2.1.18   
+• “Obtaining scalar state information in an Abaqus/CFD analysis,” Section 2.1.19   
+• “Obtaining vector state information in an Abaqus/CFD analysis,” Section 2.1.20   
+• “Obtaining the MPI communicator in an Abaqus/CFD analysis,” Section 2.1.21   
+• “Ensuring thread safety,” Section 2.1.22   
+• “Allocatable arrays,” Section 2.1.23
+
+<!-- source-page: 596 -->
+
+<!-- source-page: 597 -->
+
+# 2.1.1 OBTAINING Abaqus ENVIRONMENT VARIABLES
+
+Products: Abaqus/Standard Abaqus/Explicit
+
+# References
+
+• “User subroutines: overview,” Section 18.1.1 of the Abaqus Analysis User’s Guide   
+• “Using the Abaqus environment settings,” Section 3.3.1 of the Abaqus Analysis User’s Guide   
+• “UWAVE and UEXTERNALDB,” Section 4.1.27 of the Abaqus Verification Guide
+
+# Overview
+
+Utility routines GETENVVAR and VGETENVVAR can be called from any Abaqus/Standard or Abaqus/Explicit user subroutine, respectively, to obtain the value of an environment variable.
+
+# Interface
+
+```txt
+character*256 ENVVAR
+...
+CALL GETENVVAR('ENVVARNAME', ENVVAR, LENVVAR)
+CALL VGETENVVAR('ENVVARNAME', ENVVAR, LENVVAR)
+... 
+```
+
+# Variable to be provided to the utility routine
+
+# ENVVARNAME
+
+Environment variable name.
+
+# Variables returned from the utility routine
+
+# ENVVAR
+
+Character string to receive the value of the environment variable.
+
+# LENVVAR
+
+Length of the character string ENVVAR.
+
+<!-- source-page: 598 -->
+
+<!-- source-page: 599 -->
+
+# 2.1.2 OBTAINING THE Abaqus JOB NAME
+
+Products: Abaqus/Standard Abaqus/Explicit
+
+# References
+
+• “User subroutines: overview,” Section 18.1.1 of the Abaqus Analysis User’s Guide   
+• “UWAVE and UEXTERNALDB,” Section 4.1.27 of the Abaqus Verification Guide
+
+# Overview
+
+Utility routines GETJOBNAME and VGETJOBNAME can be called from any Abaqus/Standard or Abaqus/Explicit user subroutine, respectively, to obtain the name of the current job.
+
+# Interface
+
+```txt
+character*256 JOBNAME
+...
+CALL GETJOBNAME( JOBNAME, LENJOBNAME )
+CALL VGETJOBNAME( JOBNAME, LENJOBNAME )
+... 
+```
+
+# Variables returned from the utility routine
+
+# JOBNAME
+
+Character string to receive the value of the job name.
+
+# LENJOBNAME
+
+Length of the character string JOBNAME.
+
+<!-- source-page: 600 -->