(disclaimer: i'm french and my english is not very good 
)
Hi, i had a weird problem with relations in my sheetmetal Template.
First i add a relations in my template to automaticly add the material in the description, It works well.
The problem is: sometimes a section ( the last "if/endif") of the relations duplicate at the end,so the relations dosen't work.
I can't found what is causing this, and it's appear randomly, i can create a bunch of new part and only one of those will have this problem.
I put this simplified version to show you the problem:
/*****************************************************************************************************************************************
/****************************** RELATION PAR DÉFAULT *************************************************************************
/*****************************************************************************************************************************************
/* The following relations make the bend allowance parameters */
/* of part to be dependent on the assigned material, if the value */
/* of the parameter SMT_UPDATE_BEND_ALLOW_INFO is YES. */
/* If you remove or change these relations, the check box */
/* 'Use assigned material to define the value of the bend */
/* allowance parameters' in the Bend Allowance category */
/* in sheet metal Preferences dialog box might stop working. */
if ( SMT_UPDATE_BEND_ALLOW_INFO == YES && exists("PTC_MATERIAL_NAME") )
if ( string_length( material_param("BEND_TABLE") ) > 0 )
SMT_PART_BEND_TABLE_NAME = material_param("BEND_TABLE")
endif
if ( material_param("INITIAL_BEND_Y_FACTOR") > 0.0 )
SMT_PART_BEND_ALLOW_FACTOR_TYPE = "Y FACTOR"
SMT_PART_BEND_ALLOWANCE_FACTOR = material_param("INITIAL_BEND_Y_FACTOR")
endif
endif
SMT_DFLT_CRNR_REL_WIDTH = SMT_THICKNESS
SMT_DFLT_CRNR_REL_DEPTH = SMT_THICKNESS
SMT_DFLT_BEND_REL_WIDTH = SMT_THICKNESS
SMT_DFLT_BEND_REL_DEPTH = SMT_THICKNESS * 2.0
SMT_GAP = 0.01
SMT_DFLT_EDGE_TREA_WIDTH = -SMT_GAP
SMT_DFLT_MITER_CUT_WIDTH = SMT_GAP
SMT_DFLT_MITER_CUT_OFFSET = 0.01
SMT_DFLT_BEND_RADIUS = SMT_THICKNESS
SMT_DFLT_BEND_REL_DEPTH = SMT_THICKNESS * 2.0
SMT_GAP = SMT_THICKNESS * 0.5
SMT_DFLT_MITER_CUT_OFFSET = SMT_THICKNESS * 1.1
/*****************************************************************************************************************************************
/****************************** RELATION DEMERS *******************************************************************************
/*****************************************************************************************************************************************
NOM=REL_MODEL_NAME
/*************** RAYONS DE PLIAGE AUTOMATIQUE ***************
IF SMT_THICKNESS < 0.120
SMT_DFLT_BEND_RADIUS= 0.040
else
SMT_DFLT_BEND_RADIUS=0.118
ENDIF
/*************** AJOUT DESCRIPTION DE MATÉRIEL AUTOMATIQUE ***************
IF AUTOMATIQUE_MATÉRIEL == YES
/***** NON REPERTORIÉ *****
DESC_MATERIEL = "NON REPERTORIÉ"
NO_REF = "-------"
/********** ALUMINIUM **********
/***** 0.032 *****
IF SMT_THICKNESS == 0.032 & PTC_MATERIAL_NAME =="ALUMINIUM_IMPERIAL" & ANTIDERAPANT == NO
DESC_MATERIEL = 'FEUILLE ALUMINIUM 5052-H32 20G (.032")'
NO_REF = "E103054"
ENDIF
/********** ALUMINIUM ANTI-DÉREPANT **********
/***** 0.063 *****
IF SMT_THICKNESS == 0.063 & PTC_MATERIAL_NAME =="ALUMINIUM_IMPERIAL" & ANTIDERAPANT == YES
DESC_MATERIEL = 'FEUILLE ALUMINIUM ANTIDÉRAPANT (.063"), MOTIF 102C'
NO_REF = "E103072"
SMT_DFLT_BEND_RADIUS=0.118
ENDIF
/********** ACIER INOXYDABLE**********
/***** 0.035 *****
IF SMT_THICKNESS == 0.035 & PTC_MATERIAL_NAME =="ACIER_IMPERIAL"
DESC_MATERIEL = 'FEUILLE ACIER INOX. 304 FINI #4 20G (.035")'
NO_REF = "E102049"
ENDIF
ENDIF
IF AUTOMATIQUE_MATÉRIEL == YES (AT THIS LINE THE LAST RELATION SECTION DUPLICATE)
/***** NON REPERTORIÉ *****
DESC_MATERIEL = "NON REPERTORIÉ"
NO_REF = "-------"
/********** ALUMINIUM **********
/***** 0.032 *****
IF SMT_THICKNESS == 0.032 & PTC_MATERIAL_NAME =="ALUMINIUM_IMPERIAL" & ANTIDERAPANT == NO
DESC_MATERIEL = 'FEUILLE ALUMINIUM 5052-H32 20G (.032")'
NO_REF = "E103054"
ENDIF
/********** ALUMINIUM ANTI-DÉREPANT **********
/***** 0.063 *****
IF SMT_THICKNESS == 0.063 & PTC_MATERIAL_NAME =="ALUMINIUM_IMPERIAL" & ANTIDERAPANT == YES
DESC_MATERIEL = 'FEUILLE ALUMINIUM ANTIDÉRAPANT (.063"), MOTIF 102C'
NO_REF = "E103072"
SMT_DFLT_BEND_RADIUS=0.118
ENDIF
/********** ACIER INOXYDABLE**********
/***** 0.035 *****
IF SMT_THICKNESS == 0.035 & PTC_MATERIAL_NAME =="ACIER_IMPERIAL"
DESC_MATERIEL = 'FEUILLE ACIER INOX. 304 FINI #4 20G (.035")'
NO_REF = "E102049"
ENDIF
ENDIF
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