Epicor Software 10-K 2005 FY Annual report

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, L. George Klaus, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Annual Report of Epicor Software Corporation on Form 10-K for the period ended December 31, 2005 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Form 10-K fairly presents in all material respects the financial condition and results of operations of Epicor Software Corporation.

Date: March 31, 2006	By:	/s/ L. George Klaus
		L. George Klaus
		Chief Executive Officer

I, Michael A. Piraino, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Annual Report of Epicor Software Corporation on Form 10-K for the period ended December 31, 2005 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Form 10-K fairly presents in all material respects the financial condition and results of operations of Epicor Software Corporation.

Date: March 31, 2006	By:	/s/Michael A. Piraino
		Michael A. Piraino
		Executive Vice President and Chief Financial Officer (Principal Financial and Accounting Officer)