Depreciation forecast after Asset revalution with AR29N inconsistent

There is a need to revalue assets on a certain date in the current

fiscal year. We did all the steps necessary to carry out revaluation

using Transaction AR29N, using the "new valuation of an asset"

function. After the reval the asset master was updated with the new Depreciation key and new useful life/dep start date.

SAP calculated the forecasted depreciation incorrectly in the

first few attempts, but after some testing it worked fine and we posted

periodic depreciation. This worked as expected. Using the same settings

in the same company code a new asset was revalued with a new value

date. The problem has returned although nothing was changed in the

system, The fore casted depreciation does not make sense.

Examples:

1. Asset Original Value at FY start - $100 with a planned dep of $1 for

the remaining useful life. Depreciation for 4th FP posted. Asset revalued

with a value date corresponding to FYP 04/2011. Revalued at $1200 with

new useful life of 24 months and new Dep start date corresponding to

start FYP 03. Expected depreciation PM is $50. This scenarion worked

fine.

2. Asset Original Value at FY start - $100 with a planned dep of $1 for

the remaining useful life. Depreciation for 4 FP posted. Asset revalued

with a value date corresponding to FYP 05/2011. Revalued at $2400 with

new useful life of 24 months and new Dep start date corresponding to

start FYP 03. Expected depreciation PM is $100. SAP shows forecasted

monthly depreciation of $108 per month