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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No. 9)*

JDA Software Group, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

46612K 10 8

(CUSIP Number)

December 31, 2004

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

o Rule 13d-1 (b)

o Rule 13d-1 (c)

þ Rule 13d-1 (d)

*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the notes).

Page 1 of 5 pages

13G

CUSIP No. 46612K 10 8 Page 2 of 5 Pages

1. Name of Reporting Person:
James D. Armstrong I.R.S. Identification Nos. of above persons (entities only):

2. Check the Appropriate Box if a Member of a Group:

(a) o

(b) o

3. SEC Use Only:

4. Citizenship or Place of Organization:
Canada

Number of
Shares
Beneficially
Owned by
Each Reporting
Person With

5. Sole Voting Power:
2,048,800

6. Shared Voting Power:
17,818

7. Sole Dispositive Power:
2,048,800

8. Shared Dispositive Power:
17,818

9. Aggregate Amount Beneficially Owned by Each Reporting Person:
2,066,618

10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares:
o

11. Percent of Class Represented by Amount in Row (9):
7.08%

12. Type of Reporting Person:
IN

Page 2 of 5 pages

Schedule 13G
James D. Armstrong (cont.)

Item 1.

(a)   Name of Issuer: JDA Software Group, Inc.

(b)   Address of Issuer’s Principal Executive Offices:

    14400 N. 87^th Street, Scottsdale, AZ 85260

Item 2.

(a)   Name of Person Filing:

    James D. Armstrong

(b)   Address of Principal Business Office or, if none, Residence:

    c/o JDA Software Group, Inc.
14400 N. 87^th Street, Scottsdale, AZ 85260
Phoenix, AZ 85260

(c)   Citizenship: Canada

(d)   Title of Class of Securities: Common Stock, $0.01 par value

(e)   CUSIP Number: 46612K 10 8

Item 3. Status of Person Filing:

Not applicable.

Item 4. Ownership

(a)   Amount Beneficially Owned:

    2,066,618 shares

(b)   Percent of Class: 7.08%

(c)   Number of shares as to which such person has:

(i)   sole power to vote or to direct the vote: 2,048,800 shares

(ii)   shared power to vote or to direct the vote: 17,818 shares

(iii)   sole power to dispose or to direct the disposition of: 2,048,800 shares

(iv)   shared power to dispose or to direct the disposition of: 17,818 shares

Page 3 of 5 pages

Schedule 13G
James D. Armstrong (cont.)

Item 5. Ownership of Five Percent or Less of a Class

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following: o

Item 6. Ownership of More than Five Percent on Behalf of Another Person

Not Applicable

Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company

Not applicable.

Item 8. Identification and Classification of Members of the Group

Not applicable.

Item 9. Notice of Dissolution of the Group

Not applicable.

Item 10. Certification

(a) Not Applicable.

(b) By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that effect.

Page 4 of 5 pages

Schedule 13G
James D. Armstrong (cont.)

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.


Date: February 2, 2005
Date

				/s/ James D. Armstrong

				Signature

				James D. Armstrong, Chairman and Chief Executive Officer

				Name/Title

Page 5 of 5 pages


13G
CUSIP No. 46612K 10 8					Page 2 of 5 Pages

	1.	Name of Reporting Person: James D. Armstrong			I.R.S. Identification Nos. of above persons (entities only):

	2.	Check the Appropriate Box if a Member of a Group:
		(a)	o
		(b)	o

	3.	SEC Use Only:

	4.	Citizenship or Place of Organization: Canada

Number of Shares Beneficially Owned by Each Reporting Person With
			5.	Sole Voting Power: 2,048,800

			6.	Shared Voting Power: 17,818

			7.	Sole Dispositive Power: 2,048,800

			8.	Shared Dispositive Power: 17,818

	9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 2,066,618

	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares: o

	11.	Percent of Class Represented by Amount in Row (9): 7.08%

	12.	Type of Reporting Person: IN

	(a)	Name of Issuer: JDA Software Group, Inc.

	(b)	Address of Issuer’s Principal Executive Offices:

		14400 N. 87^th Street, Scottsdale, AZ 85260

	(a)	Name of Person Filing:

		James D. Armstrong

	(b)	Address of Principal Business Office or, if none, Residence:

		c/o JDA Software Group, Inc. 14400 N. 87^th Street, Scottsdale, AZ 85260 Phoenix, AZ 85260

	(c)	Citizenship: Canada

	(d)	Title of Class of Securities: Common Stock, $0.01 par value

	(e)	CUSIP Number: 46612K 10 8

	(a)	Amount Beneficially Owned:

		2,066,618 shares

	(b)	Percent of Class: 7.08%

	(c)	Number of shares as to which such person has:

	(i)	sole power to vote or to direct the vote: 2,048,800 shares

	(ii)	shared power to vote or to direct the vote: 17,818 shares

	(iii)	sole power to dispose or to direct the disposition of: 2,048,800 shares

	(iv)	shared power to dispose or to direct the disposition of: 17,818 shares


Item 6.	Ownership of More than Five Percent on Behalf of Another Person


Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company


Item 8.	Identification and Classification of Members of the Group

(a)	Not Applicable.

(b)	By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that effect.