CTLR HAD LESS THAN STANDARD SEPARATION BETWEEN CROSSING TRAFFIC; MLG LEVEL AND WDB CLIMBING.

Narrative

ABOUT 1 HR INTO MY FIRST SHIFT BACK FROM A WEEKEND; WORKING LIGHT TO MODERATE TFC WITH VERY LITTLE COMPLEXITY; I HAD AN OPERROR. THE ERROR OCCURRED WITH AN MLG Y NBOUND AND A WDB X EBND. THE NBOUND MLG Y HAD BEEN ON FREQ FOR ABOUT 5 MINS; WAS HANDED OFF TO A SUCCEEDING SECTOR AND COM WAS TRANSFERRED TO THAT SECTOR. AT ABOUT THAT SAME TIME; THE DATA BLOCK OF THE EBND WDB X WAS FORCED UP ON MY RADAR SCOPE IN THE FORM OF A POINT OUT. THE WDB X WAS STOPPED AT FL290 FOR THE NBOUND MLG Y BY SECTOR B; WHO WAS WORKING BOTH ACFT. I; AT SECTOR A; OPTED TO TAKE RADAR CONTACT AND WORK THE WDB X SINCE THAT ACFT WOULD BE IN CONFLICT WITH OTHER ACFT IN MY SECTOR. THE WDB X CHKED ON MY FREQ CLBING TO FL290 AND WAS ACKNOWLEDGED. I THEN ASKED MY D-SIDE IF THE WDB X WAS MY CTL FOR CLB; HE COORDINATED WITH SECTOR B WHO STIPULATED THE WDB X WAS MY CTL REF THE MLG Y; WHO WAS STILL IN THE CONFINES OF MY SECTOR. I REMEMBER STATING THAT I WOULD INDEED SEPARATE MY TFC. ABOUT 1 MIN LATER; THE WDB X RPTED LEVEL AT FL290 REQUESTING FL410. I; ALMOST IMMEDIATELY; CLRED THE WDB X TO FL410. I CAUGHT THE ERROR AT THE SAME TIME THE C/A WENT OFF. THE WDB X WAS 300' HIGH AND CLBING AT ABOUT 1500 FPM. I CLRED THE WDB X BACK TO FL290; THE CLRNC WAS MISSED; I THEN TOLD THE ACFT TO MAINTAIN FL300 AND ISSUED THE CONFLICTING TFC. PROX OF ACFT--4 MI AND 900'. POSSIBLE CONTRIBUTING FACTORS ARE: 1) FIRST DAY BACK FROM WEEKEND; NOT ON NECESSARY MENTAL PLAIN. 2) NOT ACTIVELY INVOLVED IN SEPARATING THE 2 ACFT INITIALLY. 3) PROJECTING THE WDB X ROUTE OF FLT AND CONFLICTIONS FOR THE NEXT 10-12 MINS OF FLT AND LETTING THE IMMEDIATE TFC SLIP FROM VIEW.