pspice error-less then 2 connection at node

Hello,

while simulation in pspice i m getting these error,what is the reason for these errors.

ERROR(ORPSIM-15141): Less than 2 connections at node 6_GND_D.

ERROR(ORPSIM-15141): Less than 2 connections at node N17178733.

ERROR(ORPSIM-15141): Less than 2 connections at node 3_N16703831.

ERROR(ORPSIM-15141): Less than 2 connections at node 3_V_SAFE.

ERROR(ORPSIM-15141): Less than 2 connections at node 13_N16759442.

ERROR(ORPSIM-15141): Less than 2 connections at node 13_VCC_D.

ERROR(ORPSIM-15141): Less than 2 connections at node 8_VCC_A.

ERROR(ORPSIM-15141): Less than 2 connections at node 8_GND_D.

ERROR(ORPSIM-15141): Less than 2 connections at node 9_VCC_A.

ERROR(ORPSIM-15141): Less than 2 connections at node 9_GND_D.

ERROR(ORPSIM-15141): Less than 2 connections at node N17186121.

ERROR(ORPSIM-15141): Less than 2 connections at node N17186124.

ERROR(ORPSIM-15141): Less than 2 connections at node 10_VCC_A.

ERROR(ORPSIM-15141): Less than 2 connections at node 10_GND_D.

ERROR(ORPSIM-15141): Less than 2 connections at node 11_XTAL1_S.

ERROR(ORPSIM-15141): Less than 2 connections at node 11_XTAL2_S.

ERROR(ORPSIM-15141): Less than 2 connections at node 11_N16801115.

ERROR(ORPSIM-15141): Less than 2 connections at node N17190141.

ERROR(ORPSIM-15141): Less than 2 connections at node 11_N16793478.

ERROR(ORPSIM-15141): Less than 2 connections at node N17190139.

ERROR(ORPSIM-15141): Less than 2 connections at node 11_N16793499.

ERROR(ORPSIM-15141): Less than 2 connections at node N17190145.

ERROR(ORPSIM-15141): Less than 2 connections at node 11_N16793510.

ERROR(ORPSIM-15141): Less than 2 connections at node 11_N16816169.

ERROR(ORPSIM-15141): Less than 2 connections at node 11_N16814002.

ERROR(ORPSIM-15141): Less than 2 connections at node 4_XTAL1_M.

ERROR(ORPSIM-15141): Less than 2 connections at node 4_XTAL2_M.

ERROR(ORPSIM-15141): Less than 2 connections at node 4_N16827900.

ERROR(ORPSIM-15141): Less than 2 connections at node 12_VCC_D.

ERROR(ORPSIM-15141): Less than 2 connections at node 12_GND_D.

ERROR(ORPSIM-15141): Less than 2 connections at node N17180848.

ERROR(ORPSIM-15141): Less than 2 connections at node 12_N16764073.

ERROR(ORPSIM-15141): Less than 2 connections at node 5_VCC_D.

ERROR(ORPSIM-15141): Less than 2 connections at node 5_GND_D.

ERROR(ORPSIM-15141): Less than 2 connections at node N17190068.

ERROR(ORPSIM-15141): Less than 2 connections at node 5_N16764091.

ERROR(ORPSIM-15141): Less than 2 connections at node 14-EEPROM_GND_D.

ERROR(ORPSIM-15141): Less than 2 connections at node SCL.

ERROR(ORPSIM-15141): Less than 2 connections at node SDA.

ERROR(ORPSIM-15141): Less than 2 connections at node 15_VCC_A.

ERROR(ORPSIM-15141): Less than 2 connections at node N17201904.

Regards

DC